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 6500 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 7 km from the centre?
6500 · 200 · 7 km · Per-capita water consumption
2. Population density is 4100 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
4100 · 50 · 4 km · Per-capita water consumption
3. Population density is 3300 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 9 km from the centre?
3300 · 75 · 9 km · Per-capita water consumption
4. Population density is 3400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 2 km from the centre?
3400 · 250 · 2 km · Per-capita water consumption
5. Population density is 7000 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 10 km from the centre?
7000 · 150 · 10 km · Per-capita water consumption
6. Population density is 6600 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 9 km from the centre?
6600 · 250 · 9 km · Per-capita water consumption
7. Population density is 5600 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 10 km from the centre?
5600 · 150 · 10 km · Per-capita water consumption
8. Population density is 7900 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 4 km from the centre?
7900 · 75 · 4 km · Per-capita water consumption
9. Population density is 6600 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?
6600 · 200 · 10 km · Per-capita water consumption
10. Population density is 5800 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
5800 · 50 · 4 km · Per-capita water consumption
11. Population density is 3700 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 4 km from the centre?
3700 · 125 · 4 km · Per-capita water consumption
12. Population density is 5100 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 10 km from the centre?
5100 · 75 · 10 km · Per-capita water consumption

12 questions · Seed 51 · 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 6500 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 7 km from the centre?
5100 people/km²
Density drop = 7 × 200 = 1400; 6500 − 1400 = 5100 people/km².
2. Population density is 4100 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
3900 people/km²
Density drop = 4 × 50 = 200; 4100 − 200 = 3900 people/km².
3. Population density is 3300 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 9 km from the centre?
2625 people/km²
Density drop = 9 × 75 = 675; 3300 − 675 = 2625 people/km².
4. Population density is 3400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 2 km from the centre?
2900 people/km²
Density drop = 2 × 250 = 500; 3400 − 500 = 2900 people/km².
5. Population density is 7000 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 10 km from the centre?
5500 people/km²
Density drop = 10 × 150 = 1500; 7000 − 1500 = 5500 people/km².
6. Population density is 6600 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 9 km from the centre?
4350 people/km²
Density drop = 9 × 250 = 2250; 6600 − 2250 = 4350 people/km².
7. Population density is 5600 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 10 km from the centre?
4100 people/km²
Density drop = 10 × 150 = 1500; 5600 − 1500 = 4100 people/km².
8. Population density is 7900 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 4 km from the centre?
7600 people/km²
Density drop = 4 × 75 = 300; 7900 − 300 = 7600 people/km².
9. Population density is 6600 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?
4600 people/km²
Density drop = 10 × 200 = 2000; 6600 − 2000 = 4600 people/km².
10. Population density is 5800 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
5600 people/km²
Density drop = 4 × 50 = 200; 5800 − 200 = 5600 people/km².
11. Population density is 3700 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 4 km from the centre?
3200 people/km²
Density drop = 4 × 125 = 500; 3700 − 500 = 3200 people/km².
12. Population density is 5100 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 10 km from the centre?
4350 people/km²
Density drop = 10 × 75 = 750; 5100 − 750 = 4350 people/km².

12 questions · Seed 51 · 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 6500 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 7 km from the centre?
6500 · 200 · 7 km · Per-capita water consumption
2. Population density is 4100 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
4100 · 50 · 4 km · Per-capita water consumption
3. Population density is 3300 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 9 km from the centre?
3300 · 75 · 9 km · Per-capita water consumption
4. Population density is 3400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 2 km from the centre?
3400 · 250 · 2 km · Per-capita water consumption
5. Population density is 7000 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 10 km from the centre?
7000 · 150 · 10 km · Per-capita water consumption
6. Population density is 6600 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 9 km from the centre?
6600 · 250 · 9 km · Per-capita water consumption
7. Population density is 5600 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 10 km from the centre?
5600 · 150 · 10 km · Per-capita water consumption
8. Population density is 7900 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 4 km from the centre?
7900 · 75 · 4 km · Per-capita water consumption
9. Population density is 6600 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?
6600 · 200 · 10 km · Per-capita water consumption
10. Population density is 5800 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
5800 · 50 · 4 km · Per-capita water consumption
11. Population density is 3700 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 4 km from the centre?
3700 · 125 · 4 km · Per-capita water consumption
12. Population density is 5100 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 10 km from the centre?
5100 · 75 · 10 km · Per-capita water consumption

12 questions · Seed 51 · 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 6500 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 7 km from the centre?
5100 people/km²
Density drop = 7 × 200 = 1400; 6500 − 1400 = 5100 people/km².
2. Population density is 4100 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
3900 people/km²
Density drop = 4 × 50 = 200; 4100 − 200 = 3900 people/km².
3. Population density is 3300 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 9 km from the centre?
2625 people/km²
Density drop = 9 × 75 = 675; 3300 − 675 = 2625 people/km².
4. Population density is 3400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 2 km from the centre?
2900 people/km²
Density drop = 2 × 250 = 500; 3400 − 500 = 2900 people/km².
5. Population density is 7000 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 10 km from the centre?
5500 people/km²
Density drop = 10 × 150 = 1500; 7000 − 1500 = 5500 people/km².
6. Population density is 6600 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 9 km from the centre?
4350 people/km²
Density drop = 9 × 250 = 2250; 6600 − 2250 = 4350 people/km².
7. Population density is 5600 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 10 km from the centre?
4100 people/km²
Density drop = 10 × 150 = 1500; 5600 − 1500 = 4100 people/km².
8. Population density is 7900 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 4 km from the centre?
7600 people/km²
Density drop = 4 × 75 = 300; 7900 − 300 = 7600 people/km².
9. Population density is 6600 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?
4600 people/km²
Density drop = 10 × 200 = 2000; 6600 − 2000 = 4600 people/km².
10. Population density is 5800 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
5600 people/km²
Density drop = 4 × 50 = 200; 5800 − 200 = 5600 people/km².
11. Population density is 3700 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 4 km from the centre?
3200 people/km²
Density drop = 4 × 125 = 500; 3700 − 500 = 3200 people/km².
12. Population density is 5100 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 10 km from the centre?
4350 people/km²
Density drop = 10 × 75 = 750; 5100 − 750 = 4350 people/km².

12 questions · Seed 51 · Age guidance, not curriculum certification