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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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Worksheet StudioPractice pack · Ages 13-15

Per-capita water consumption

Take your time. Show your thinking.

1. Population density is 8600 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 3 km from the centre?
8600 · 175 · 3 km · Per-capita water consumption
2. Population density is 8800 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 2 km from the centre?
8800 · 75 · 2 km · Per-capita water consumption
3. Population density is 6200 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 4 km from the centre?
6200 · 200 · 4 km · Per-capita water consumption
4. Population density is 8500 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 6 km from the centre?
8500 · 175 · 6 km · Per-capita water consumption
5. Population density is 6100 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 3 km from the centre?
6100 · 125 · 3 km · Per-capita water consumption
6. Population density is 5500 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 8 km from the centre?
5500 · 50 · 8 km · Per-capita water consumption
7. Population density is 6100 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 8 km from the centre?
6100 · 50 · 8 km · Per-capita water consumption
8. Population density is 4500 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 7 km from the centre?
4500 · 50 · 7 km · Per-capita water consumption
9. Population density is 4500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 6 km from the centre?
4500 · 225 · 6 km · Per-capita water consumption
10. Population density is 7100 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 4 km from the centre?
7100 · 100 · 4 km · Per-capita water consumption
11. Population density is 4900 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 4 km from the centre?
4900 · 100 · 4 km · Per-capita water consumption
12. Population density is 8900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 9 km from the centre?
8900 · 150 · 9 km · Per-capita water consumption

12 questions · Seed 104730 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

Per-capita water consumption

Answers and reasoning. Review before teaching.

1. Population density is 8600 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 3 km from the centre?
8075 people/km²
Density drop = 3 × 175 = 525; 8600 − 525 = 8075 people/km².
2. Population density is 8800 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 2 km from the centre?
8650 people/km²
Density drop = 2 × 75 = 150; 8800 − 150 = 8650 people/km².
3. Population density is 6200 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 4 km from the centre?
5400 people/km²
Density drop = 4 × 200 = 800; 6200 − 800 = 5400 people/km².
4. Population density is 8500 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 6 km from the centre?
7450 people/km²
Density drop = 6 × 175 = 1050; 8500 − 1050 = 7450 people/km².
5. Population density is 6100 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 3 km from the centre?
5725 people/km²
Density drop = 3 × 125 = 375; 6100 − 375 = 5725 people/km².
6. Population density is 5500 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 8 km from the centre?
5100 people/km²
Density drop = 8 × 50 = 400; 5500 − 400 = 5100 people/km².
7. Population density is 6100 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 8 km from the centre?
5700 people/km²
Density drop = 8 × 50 = 400; 6100 − 400 = 5700 people/km².
8. Population density is 4500 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 7 km from the centre?
4150 people/km²
Density drop = 7 × 50 = 350; 4500 − 350 = 4150 people/km².
9. Population density is 4500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 6 km from the centre?
3150 people/km²
Density drop = 6 × 225 = 1350; 4500 − 1350 = 3150 people/km².
10. Population density is 7100 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 4 km from the centre?
6700 people/km²
Density drop = 4 × 100 = 400; 7100 − 400 = 6700 people/km².
11. Population density is 4900 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 4 km from the centre?
4500 people/km²
Density drop = 4 × 100 = 400; 4900 − 400 = 4500 people/km².
12. Population density is 8900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 9 km from the centre?
7550 people/km²
Density drop = 9 × 150 = 1350; 8900 − 1350 = 7550 people/km².

12 questions · Seed 104730 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Per-capita water consumption

Take your time. Show your thinking.

1. Population density is 8600 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 3 km from the centre?
8600 · 175 · 3 km · Per-capita water consumption
2. Population density is 8800 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 2 km from the centre?
8800 · 75 · 2 km · Per-capita water consumption
3. Population density is 6200 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 4 km from the centre?
6200 · 200 · 4 km · Per-capita water consumption
4. Population density is 8500 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 6 km from the centre?
8500 · 175 · 6 km · Per-capita water consumption
5. Population density is 6100 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 3 km from the centre?
6100 · 125 · 3 km · Per-capita water consumption
6. Population density is 5500 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 8 km from the centre?
5500 · 50 · 8 km · Per-capita water consumption
7. Population density is 6100 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 8 km from the centre?
6100 · 50 · 8 km · Per-capita water consumption
8. Population density is 4500 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 7 km from the centre?
4500 · 50 · 7 km · Per-capita water consumption
9. Population density is 4500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 6 km from the centre?
4500 · 225 · 6 km · Per-capita water consumption
10. Population density is 7100 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 4 km from the centre?
7100 · 100 · 4 km · Per-capita water consumption
11. Population density is 4900 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 4 km from the centre?
4900 · 100 · 4 km · Per-capita water consumption
12. Population density is 8900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 9 km from the centre?
8900 · 150 · 9 km · Per-capita water consumption

12 questions · Seed 104730 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Per-capita water consumption

Answers and reasoning. Review before teaching.

1. Population density is 8600 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 3 km from the centre?
8075 people/km²
Density drop = 3 × 175 = 525; 8600 − 525 = 8075 people/km².
2. Population density is 8800 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 2 km from the centre?
8650 people/km²
Density drop = 2 × 75 = 150; 8800 − 150 = 8650 people/km².
3. Population density is 6200 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 4 km from the centre?
5400 people/km²
Density drop = 4 × 200 = 800; 6200 − 800 = 5400 people/km².
4. Population density is 8500 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 6 km from the centre?
7450 people/km²
Density drop = 6 × 175 = 1050; 8500 − 1050 = 7450 people/km².
5. Population density is 6100 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 3 km from the centre?
5725 people/km²
Density drop = 3 × 125 = 375; 6100 − 375 = 5725 people/km².
6. Population density is 5500 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 8 km from the centre?
5100 people/km²
Density drop = 8 × 50 = 400; 5500 − 400 = 5100 people/km².
7. Population density is 6100 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 8 km from the centre?
5700 people/km²
Density drop = 8 × 50 = 400; 6100 − 400 = 5700 people/km².
8. Population density is 4500 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 7 km from the centre?
4150 people/km²
Density drop = 7 × 50 = 350; 4500 − 350 = 4150 people/km².
9. Population density is 4500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 6 km from the centre?
3150 people/km²
Density drop = 6 × 225 = 1350; 4500 − 1350 = 3150 people/km².
10. Population density is 7100 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 4 km from the centre?
6700 people/km²
Density drop = 4 × 100 = 400; 7100 − 400 = 6700 people/km².
11. Population density is 4900 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 4 km from the centre?
4500 people/km²
Density drop = 4 × 100 = 400; 4900 − 400 = 4500 people/km².
12. Population density is 8900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 9 km from the centre?
7550 people/km²
Density drop = 9 × 150 = 1350; 8900 − 1350 = 7550 people/km².

12 questions · Seed 104730 · Age guidance, not curriculum certification