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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 7000 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 7 km from the centre?
7000 · 100 · 7 km · Per-capita water consumption
2. Population density is 8800 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 5 km from the centre?
8800 · 200 · 5 km · Per-capita water consumption
3. Population density is 9000 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 2 km from the centre?
9000 · 50 · 2 km · Per-capita water consumption
4. Population density is 3700 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 10 km from the centre?
3700 · 175 · 10 km · Per-capita water consumption
5. Population density is 5900 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 7 km from the centre?
5900 · 225 · 7 km · Per-capita water consumption
6. Population density is 4300 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?
4300 · 100 · 6 km · Per-capita water consumption
7. Population density is 7500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 2 km from the centre?
7500 · 225 · 2 km · Per-capita water consumption
8. Population density is 8300 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 7 km from the centre?
8300 · 175 · 7 km · Per-capita water consumption
9. Population density is 8400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 10 km from the centre?
8400 · 250 · 10 km · Per-capita water consumption
10. Population density is 3800 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?
3800 · 150 · 2 km · Per-capita water consumption
11. Population density is 4300 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 6 km from the centre?
4300 · 75 · 6 km · Per-capita water consumption
12. Population density is 8600 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?
8600 · 75 · 4 km · Per-capita water consumption

12 questions · Seed 42 · 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 7000 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 7 km from the centre?
6300 people/km²
Density drop = 7 × 100 = 700; 7000 − 700 = 6300 people/km².
2. Population density is 8800 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 5 km from the centre?
7800 people/km²
Density drop = 5 × 200 = 1000; 8800 − 1000 = 7800 people/km².
3. Population density is 9000 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 2 km from the centre?
8900 people/km²
Density drop = 2 × 50 = 100; 9000 − 100 = 8900 people/km².
4. Population density is 3700 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 10 km from the centre?
1950 people/km²
Density drop = 10 × 175 = 1750; 3700 − 1750 = 1950 people/km².
5. Population density is 5900 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 7 km from the centre?
4325 people/km²
Density drop = 7 × 225 = 1575; 5900 − 1575 = 4325 people/km².
6. Population density is 4300 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?
3700 people/km²
Density drop = 6 × 100 = 600; 4300 − 600 = 3700 people/km².
7. Population density is 7500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 2 km from the centre?
7050 people/km²
Density drop = 2 × 225 = 450; 7500 − 450 = 7050 people/km².
8. Population density is 8300 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 7 km from the centre?
7075 people/km²
Density drop = 7 × 175 = 1225; 8300 − 1225 = 7075 people/km².
9. Population density is 8400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 10 km from the centre?
5900 people/km²
Density drop = 10 × 250 = 2500; 8400 − 2500 = 5900 people/km².
10. Population density is 3800 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?
3500 people/km²
Density drop = 2 × 150 = 300; 3800 − 300 = 3500 people/km².
11. Population density is 4300 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 6 km from the centre?
3850 people/km²
Density drop = 6 × 75 = 450; 4300 − 450 = 3850 people/km².
12. Population density is 8600 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?
8300 people/km²
Density drop = 4 × 75 = 300; 8600 − 300 = 8300 people/km².

12 questions · Seed 42 · 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 7000 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 7 km from the centre?
7000 · 100 · 7 km · Per-capita water consumption
2. Population density is 8800 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 5 km from the centre?
8800 · 200 · 5 km · Per-capita water consumption
3. Population density is 9000 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 2 km from the centre?
9000 · 50 · 2 km · Per-capita water consumption
4. Population density is 3700 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 10 km from the centre?
3700 · 175 · 10 km · Per-capita water consumption
5. Population density is 5900 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 7 km from the centre?
5900 · 225 · 7 km · Per-capita water consumption
6. Population density is 4300 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?
4300 · 100 · 6 km · Per-capita water consumption
7. Population density is 7500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 2 km from the centre?
7500 · 225 · 2 km · Per-capita water consumption
8. Population density is 8300 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 7 km from the centre?
8300 · 175 · 7 km · Per-capita water consumption
9. Population density is 8400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 10 km from the centre?
8400 · 250 · 10 km · Per-capita water consumption
10. Population density is 3800 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?
3800 · 150 · 2 km · Per-capita water consumption
11. Population density is 4300 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 6 km from the centre?
4300 · 75 · 6 km · Per-capita water consumption
12. Population density is 8600 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?
8600 · 75 · 4 km · Per-capita water consumption

12 questions · Seed 42 · 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 7000 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 7 km from the centre?
6300 people/km²
Density drop = 7 × 100 = 700; 7000 − 700 = 6300 people/km².
2. Population density is 8800 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 5 km from the centre?
7800 people/km²
Density drop = 5 × 200 = 1000; 8800 − 1000 = 7800 people/km².
3. Population density is 9000 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 2 km from the centre?
8900 people/km²
Density drop = 2 × 50 = 100; 9000 − 100 = 8900 people/km².
4. Population density is 3700 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 10 km from the centre?
1950 people/km²
Density drop = 10 × 175 = 1750; 3700 − 1750 = 1950 people/km².
5. Population density is 5900 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 7 km from the centre?
4325 people/km²
Density drop = 7 × 225 = 1575; 5900 − 1575 = 4325 people/km².
6. Population density is 4300 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?
3700 people/km²
Density drop = 6 × 100 = 600; 4300 − 600 = 3700 people/km².
7. Population density is 7500 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 2 km from the centre?
7050 people/km²
Density drop = 2 × 225 = 450; 7500 − 450 = 7050 people/km².
8. Population density is 8300 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 7 km from the centre?
7075 people/km²
Density drop = 7 × 175 = 1225; 8300 − 1225 = 7075 people/km².
9. Population density is 8400 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 10 km from the centre?
5900 people/km²
Density drop = 10 × 250 = 2500; 8400 − 2500 = 5900 people/km².
10. Population density is 3800 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?
3500 people/km²
Density drop = 2 × 150 = 300; 3800 − 300 = 3500 people/km².
11. Population density is 4300 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 6 km from the centre?
3850 people/km²
Density drop = 6 × 75 = 450; 4300 − 450 = 3850 people/km².
12. Population density is 8600 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?
8300 people/km²
Density drop = 4 × 75 = 300; 8600 − 300 = 8300 people/km².

12 questions · Seed 42 · Age guidance, not curriculum certification