Our worldAges 16-18

Per-capita water consumption

Divide total daily community water use by population to find per-capita consumption in litres. Review suitability for your learners before teaching.

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Age band:Ages 13-15 Ages 16-18

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Worksheet StudioPractice pack · Ages 16-18

Per-capita water consumption

Take your time. Show your thinking.

1. Population density is 6000 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 10 km from the centre?
6000 · 200 · 10 km · Per-capita water consumption
2. Population density is 6200 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 5 km from the centre?
6200 · 125 · 5 km · Per-capita water consumption
3. Population density is 3000 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 4 km from the centre?
3000 · 225 · 4 km · Per-capita water consumption
4. Population density is 4200 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 5 km from the centre?
4200 · 175 · 5 km · Per-capita water consumption
5. Population density is 3900 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 5 km from the centre?
3900 · 175 · 5 km · Per-capita water consumption
6. Population density is 4100 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 5 km from the centre?
4100 · 150 · 5 km · Per-capita water consumption
7. Population density is 6500 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 6 km from the centre?
6500 · 100 · 6 km · Per-capita water consumption
8. Population density is 5500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 8 km from the centre?
5500 · 225 · 8 km · Per-capita water consumption
9. Population density is 4500 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 2 km from the centre?
4500 · 200 · 2 km · Per-capita water consumption
10. Population density is 3600 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 5 km from the centre?
3600 · 125 · 5 km · Per-capita water consumption
11. Population density is 3200 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 7 km from the centre?
3200 · 150 · 7 km · Per-capita water consumption
12. Population density is 5400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 6 km from the centre?
5400 · 250 · 6 km · Per-capita water consumption

12 questions · Seed 46 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 16-18

Per-capita water consumption

Answers and reasoning. Review before teaching.

1. Population density is 6000 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 10 km from the centre?
4000 people/km²
Density drop = 10 × 200 = 2000; 6000 − 2000 = 4000 people/km².
2. Population density is 6200 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 5 km from the centre?
5575 people/km²
Density drop = 5 × 125 = 625; 6200 − 625 = 5575 people/km².
3. Population density is 3000 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 4 km from the centre?
2100 people/km²
Density drop = 4 × 225 = 900; 3000 − 900 = 2100 people/km².
4. Population density is 4200 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 5 km from the centre?
3325 people/km²
Density drop = 5 × 175 = 875; 4200 − 875 = 3325 people/km².
5. Population density is 3900 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 5 km from the centre?
3025 people/km²
Density drop = 5 × 175 = 875; 3900 − 875 = 3025 people/km².
6. Population density is 4100 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 5 km from the centre?
3350 people/km²
Density drop = 5 × 150 = 750; 4100 − 750 = 3350 people/km².
7. Population density is 6500 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 6 km from the centre?
5900 people/km²
Density drop = 6 × 100 = 600; 6500 − 600 = 5900 people/km².
8. Population density is 5500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 8 km from the centre?
3700 people/km²
Density drop = 8 × 225 = 1800; 5500 − 1800 = 3700 people/km².
9. Population density is 4500 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 2 km from the centre?
4100 people/km²
Density drop = 2 × 200 = 400; 4500 − 400 = 4100 people/km².
10. Population density is 3600 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 5 km from the centre?
2975 people/km²
Density drop = 5 × 125 = 625; 3600 − 625 = 2975 people/km².
11. Population density is 3200 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 7 km from the centre?
2150 people/km²
Density drop = 7 × 150 = 1050; 3200 − 1050 = 2150 people/km².
12. Population density is 5400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 6 km from the centre?
3900 people/km²
Density drop = 6 × 250 = 1500; 5400 − 1500 = 3900 people/km².

12 questions · Seed 46 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Per-capita water consumption

Take your time. Show your thinking.

1. Population density is 6000 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 10 km from the centre?
6000 · 200 · 10 km · Per-capita water consumption
2. Population density is 6200 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 5 km from the centre?
6200 · 125 · 5 km · Per-capita water consumption
3. Population density is 3000 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 4 km from the centre?
3000 · 225 · 4 km · Per-capita water consumption
4. Population density is 4200 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 5 km from the centre?
4200 · 175 · 5 km · Per-capita water consumption
5. Population density is 3900 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 5 km from the centre?
3900 · 175 · 5 km · Per-capita water consumption
6. Population density is 4100 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 5 km from the centre?
4100 · 150 · 5 km · Per-capita water consumption
7. Population density is 6500 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 6 km from the centre?
6500 · 100 · 6 km · Per-capita water consumption
8. Population density is 5500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 8 km from the centre?
5500 · 225 · 8 km · Per-capita water consumption
9. Population density is 4500 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 2 km from the centre?
4500 · 200 · 2 km · Per-capita water consumption
10. Population density is 3600 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 5 km from the centre?
3600 · 125 · 5 km · Per-capita water consumption
11. Population density is 3200 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 7 km from the centre?
3200 · 150 · 7 km · Per-capita water consumption
12. Population density is 5400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 6 km from the centre?
5400 · 250 · 6 km · Per-capita water consumption

12 questions · Seed 46 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Per-capita water consumption

Answers and reasoning. Review before teaching.

1. Population density is 6000 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 10 km from the centre?
4000 people/km²
Density drop = 10 × 200 = 2000; 6000 − 2000 = 4000 people/km².
2. Population density is 6200 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 5 km from the centre?
5575 people/km²
Density drop = 5 × 125 = 625; 6200 − 625 = 5575 people/km².
3. Population density is 3000 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 4 km from the centre?
2100 people/km²
Density drop = 4 × 225 = 900; 3000 − 900 = 2100 people/km².
4. Population density is 4200 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 5 km from the centre?
3325 people/km²
Density drop = 5 × 175 = 875; 4200 − 875 = 3325 people/km².
5. Population density is 3900 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 5 km from the centre?
3025 people/km²
Density drop = 5 × 175 = 875; 3900 − 875 = 3025 people/km².
6. Population density is 4100 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 5 km from the centre?
3350 people/km²
Density drop = 5 × 150 = 750; 4100 − 750 = 3350 people/km².
7. Population density is 6500 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 6 km from the centre?
5900 people/km²
Density drop = 6 × 100 = 600; 6500 − 600 = 5900 people/km².
8. Population density is 5500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 8 km from the centre?
3700 people/km²
Density drop = 8 × 225 = 1800; 5500 − 1800 = 3700 people/km².
9. Population density is 4500 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 2 km from the centre?
4100 people/km²
Density drop = 2 × 200 = 400; 4500 − 400 = 4100 people/km².
10. Population density is 3600 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 5 km from the centre?
2975 people/km²
Density drop = 5 × 125 = 625; 3600 − 625 = 2975 people/km².
11. Population density is 3200 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 7 km from the centre?
2150 people/km²
Density drop = 7 × 150 = 1050; 3200 − 1050 = 2150 people/km².
12. Population density is 5400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 6 km from the centre?
3900 people/km²
Density drop = 6 × 250 = 1500; 5400 − 1500 = 3900 people/km².

12 questions · Seed 46 · Age guidance, not curriculum certification