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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 7500 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 2 km from the centre?
7500 · 125 · 2 km · Per-capita water consumption
2. Population density is 3300 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?
3300 · 50 · 7 km · Per-capita water consumption
3. Population density is 4900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 4 km from the centre?
4900 · 150 · 4 km · Per-capita water consumption
4. Population density is 4200 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?
4200 · 150 · 5 km · Per-capita water consumption
5. Population density is 4100 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 · 200 · 2 km · Per-capita water consumption
6. Population density is 4600 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 4 km from the centre?
4600 · 250 · 4 km · Per-capita water consumption
7. Population density is 8800 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?
8800 · 250 · 6 km · Per-capita water consumption
8. Population density is 5600 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 2 km from the centre?
5600 · 175 · 2 km · Per-capita water consumption
9. Population density is 8600 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 6 km from the centre?
8600 · 125 · 6 km · Per-capita water consumption
10. Population density is 7300 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 9 km from the centre?
7300 · 175 · 9 km · Per-capita water consumption
11. Population density is 7500 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?
7500 · 225 · 4 km · Per-capita water consumption
12. Population density is 8900 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 10 km from the centre?
8900 · 125 · 10 km · Per-capita water consumption

12 questions · Seed 50 · 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 7500 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 2 km from the centre?
7250 people/km²
Density drop = 2 × 125 = 250; 7500 − 250 = 7250 people/km².
2. Population density is 3300 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?
2950 people/km²
Density drop = 7 × 50 = 350; 3300 − 350 = 2950 people/km².
3. Population density is 4900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 4 km from the centre?
4300 people/km²
Density drop = 4 × 150 = 600; 4900 − 600 = 4300 people/km².
4. Population density is 4200 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?
3450 people/km²
Density drop = 5 × 150 = 750; 4200 − 750 = 3450 people/km².
5. Population density is 4100 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?
3700 people/km²
Density drop = 2 × 200 = 400; 4100 − 400 = 3700 people/km².
6. Population density is 4600 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 4 km from the centre?
3600 people/km²
Density drop = 4 × 250 = 1000; 4600 − 1000 = 3600 people/km².
7. Population density is 8800 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?
7300 people/km²
Density drop = 6 × 250 = 1500; 8800 − 1500 = 7300 people/km².
8. Population density is 5600 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 2 km from the centre?
5250 people/km²
Density drop = 2 × 175 = 350; 5600 − 350 = 5250 people/km².
9. Population density is 8600 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 6 km from the centre?
7850 people/km²
Density drop = 6 × 125 = 750; 8600 − 750 = 7850 people/km².
10. Population density is 7300 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 9 km from the centre?
5725 people/km²
Density drop = 9 × 175 = 1575; 7300 − 1575 = 5725 people/km².
11. Population density is 7500 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?
6600 people/km²
Density drop = 4 × 225 = 900; 7500 − 900 = 6600 people/km².
12. Population density is 8900 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 10 km from the centre?
7650 people/km²
Density drop = 10 × 125 = 1250; 8900 − 1250 = 7650 people/km².

12 questions · Seed 50 · 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 7500 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 2 km from the centre?
7500 · 125 · 2 km · Per-capita water consumption
2. Population density is 3300 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?
3300 · 50 · 7 km · Per-capita water consumption
3. Population density is 4900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 4 km from the centre?
4900 · 150 · 4 km · Per-capita water consumption
4. Population density is 4200 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?
4200 · 150 · 5 km · Per-capita water consumption
5. Population density is 4100 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 · 200 · 2 km · Per-capita water consumption
6. Population density is 4600 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 4 km from the centre?
4600 · 250 · 4 km · Per-capita water consumption
7. Population density is 8800 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?
8800 · 250 · 6 km · Per-capita water consumption
8. Population density is 5600 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 2 km from the centre?
5600 · 175 · 2 km · Per-capita water consumption
9. Population density is 8600 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 6 km from the centre?
8600 · 125 · 6 km · Per-capita water consumption
10. Population density is 7300 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 9 km from the centre?
7300 · 175 · 9 km · Per-capita water consumption
11. Population density is 7500 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?
7500 · 225 · 4 km · Per-capita water consumption
12. Population density is 8900 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 10 km from the centre?
8900 · 125 · 10 km · Per-capita water consumption

12 questions · Seed 50 · 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 7500 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 2 km from the centre?
7250 people/km²
Density drop = 2 × 125 = 250; 7500 − 250 = 7250 people/km².
2. Population density is 3300 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?
2950 people/km²
Density drop = 7 × 50 = 350; 3300 − 350 = 2950 people/km².
3. Population density is 4900 people/km² in the city centre and falls by 150 people/km² for each kilometre outward. What is the density 4 km from the centre?
4300 people/km²
Density drop = 4 × 150 = 600; 4900 − 600 = 4300 people/km².
4. Population density is 4200 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?
3450 people/km²
Density drop = 5 × 150 = 750; 4200 − 750 = 3450 people/km².
5. Population density is 4100 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?
3700 people/km²
Density drop = 2 × 200 = 400; 4100 − 400 = 3700 people/km².
6. Population density is 4600 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 4 km from the centre?
3600 people/km²
Density drop = 4 × 250 = 1000; 4600 − 1000 = 3600 people/km².
7. Population density is 8800 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?
7300 people/km²
Density drop = 6 × 250 = 1500; 8800 − 1500 = 7300 people/km².
8. Population density is 5600 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 2 km from the centre?
5250 people/km²
Density drop = 2 × 175 = 350; 5600 − 350 = 5250 people/km².
9. Population density is 8600 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 6 km from the centre?
7850 people/km²
Density drop = 6 × 125 = 750; 8600 − 750 = 7850 people/km².
10. Population density is 7300 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 9 km from the centre?
5725 people/km²
Density drop = 9 × 175 = 1575; 7300 − 1575 = 5725 people/km².
11. Population density is 7500 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?
6600 people/km²
Density drop = 4 × 225 = 900; 7500 − 900 = 6600 people/km².
12. Population density is 8900 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 10 km from the centre?
7650 people/km²
Density drop = 10 × 125 = 1250; 8900 − 1250 = 7650 people/km².

12 questions · Seed 50 · Age guidance, not curriculum certification