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 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
2. Population density is 5400 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 5 km from the centre?
5400 · 75 · 5 km · Per-capita water consumption
3. Population density is 3200 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 8 km from the centre?
3200 · 175 · 8 km · Per-capita water consumption
4. Population density is 4900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 6 km from the centre?
4900 · 150 · 6 km · Per-capita water consumption
5. Population density is 5600 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?
5600 · 150 · 5 km · Per-capita water consumption
6. Population density is 3800 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?
3800 · 200 · 7 km · Per-capita water consumption
7. Population density is 7900 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?
7900 · 250 · 9 km · Per-capita water consumption
8. Population density is 4000 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 3 km from the centre?
4000 · 200 · 3 km · Per-capita water consumption
9. Population density is 3400 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 10 km from the centre?
3400 · 100 · 10 km · Per-capita water consumption
10. Population density is 3300 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?
3300 · 200 · 7 km · Per-capita water consumption
11. Population density is 3600 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 2 km from the centre?
3600 · 150 · 2 km · Per-capita water consumption
12. Population density is 6200 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 9 km from the centre?
6200 · 100 · 9 km · Per-capita water consumption

12 questions · Seed 48 · 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 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.
2. Population density is 5400 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 5 km from the centre?
5025 people/km²
Density drop = 5 × 75 = 375; 5400 − 375 = 5025 people/km².
3. Population density is 3200 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 8 km from the centre?
1800 people/km²
Density drop = 8 × 175 = 1400; 3200 − 1400 = 1800 people/km².
4. Population density is 4900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 6 km from the centre?
4000 people/km²
Density drop = 6 × 150 = 900; 4900 − 900 = 4000 people/km².
5. Population density is 5600 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?
4850 people/km²
Density drop = 5 × 150 = 750; 5600 − 750 = 4850 people/km².
6. Population density is 3800 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?
2400 people/km²
Density drop = 7 × 200 = 1400; 3800 − 1400 = 2400 people/km².
7. Population density is 7900 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?
5650 people/km²
Density drop = 9 × 250 = 2250; 7900 − 2250 = 5650 people/km².
8. Population density is 4000 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 3 km from the centre?
3400 people/km²
Density drop = 3 × 200 = 600; 4000 − 600 = 3400 people/km².
9. Population density is 3400 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 10 km from the centre?
2400 people/km²
Density drop = 10 × 100 = 1000; 3400 − 1000 = 2400 people/km².
10. Population density is 3300 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?
1900 people/km²
Density drop = 7 × 200 = 1400; 3300 − 1400 = 1900 people/km².
11. Population density is 3600 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 2 km from the centre?
3300 people/km²
Density drop = 2 × 150 = 300; 3600 − 300 = 3300 people/km².
12. Population density is 6200 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 9 km from the centre?
5300 people/km²
Density drop = 9 × 100 = 900; 6200 − 900 = 5300 people/km².

12 questions · Seed 48 · 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 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
2. Population density is 5400 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 5 km from the centre?
5400 · 75 · 5 km · Per-capita water consumption
3. Population density is 3200 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 8 km from the centre?
3200 · 175 · 8 km · Per-capita water consumption
4. Population density is 4900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 6 km from the centre?
4900 · 150 · 6 km · Per-capita water consumption
5. Population density is 5600 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?
5600 · 150 · 5 km · Per-capita water consumption
6. Population density is 3800 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?
3800 · 200 · 7 km · Per-capita water consumption
7. Population density is 7900 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?
7900 · 250 · 9 km · Per-capita water consumption
8. Population density is 4000 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 3 km from the centre?
4000 · 200 · 3 km · Per-capita water consumption
9. Population density is 3400 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 10 km from the centre?
3400 · 100 · 10 km · Per-capita water consumption
10. Population density is 3300 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?
3300 · 200 · 7 km · Per-capita water consumption
11. Population density is 3600 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 2 km from the centre?
3600 · 150 · 2 km · Per-capita water consumption
12. Population density is 6200 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 9 km from the centre?
6200 · 100 · 9 km · Per-capita water consumption

12 questions · Seed 48 · 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 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.
2. Population density is 5400 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 5 km from the centre?
5025 people/km²
Density drop = 5 × 75 = 375; 5400 − 375 = 5025 people/km².
3. Population density is 3200 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 8 km from the centre?
1800 people/km²
Density drop = 8 × 175 = 1400; 3200 − 1400 = 1800 people/km².
4. Population density is 4900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 6 km from the centre?
4000 people/km²
Density drop = 6 × 150 = 900; 4900 − 900 = 4000 people/km².
5. Population density is 5600 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?
4850 people/km²
Density drop = 5 × 150 = 750; 5600 − 750 = 4850 people/km².
6. Population density is 3800 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?
2400 people/km²
Density drop = 7 × 200 = 1400; 3800 − 1400 = 2400 people/km².
7. Population density is 7900 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?
5650 people/km²
Density drop = 9 × 250 = 2250; 7900 − 2250 = 5650 people/km².
8. Population density is 4000 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 3 km from the centre?
3400 people/km²
Density drop = 3 × 200 = 600; 4000 − 600 = 3400 people/km².
9. Population density is 3400 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 10 km from the centre?
2400 people/km²
Density drop = 10 × 100 = 1000; 3400 − 1000 = 2400 people/km².
10. Population density is 3300 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?
1900 people/km²
Density drop = 7 × 200 = 1400; 3300 − 1400 = 1900 people/km².
11. Population density is 3600 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 2 km from the centre?
3300 people/km²
Density drop = 2 × 150 = 300; 3600 − 300 = 3300 people/km².
12. Population density is 6200 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 9 km from the centre?
5300 people/km²
Density drop = 9 × 100 = 900; 6200 − 900 = 5300 people/km².

12 questions · Seed 48 · Age guidance, not curriculum certification