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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 7600 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?
7600 · 100 · 4 km · Per-capita water consumption
2. Population density is 6700 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?
6700 · 125 · 4 km · Per-capita water consumption
3. Population density is 3200 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 7 km from the centre?
3200 · 125 · 7 km · Per-capita water consumption
4. Population density is 9000 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 7 km from the centre?
9000 · 250 · 7 km · Per-capita water consumption
5. Population density is 9000 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?
9000 · 200 · 3 km · Per-capita water consumption
6. Population density is 6800 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?
6800 · 200 · 10 km · Per-capita water consumption
7. Population density is 6700 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 7 km from the centre?
6700 · 250 · 7 km · Per-capita water consumption
8. Population density is 4500 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 3 km from the centre?
4500 · 250 · 3 km · Per-capita water consumption
9. Population density is 4400 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?
4400 · 250 · 9 km · Per-capita water consumption
10. Population density is 6000 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?
6000 · 75 · 10 km · Per-capita water consumption
11. Population density is 4800 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?
4800 · 50 · 2 km · Per-capita water consumption
12. Population density is 8300 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?
8300 · 100 · 7 km · Per-capita water consumption

12 questions · Seed 47 · 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 7600 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?
7200 people/km²
Density drop = 4 × 100 = 400; 7600 − 400 = 7200 people/km².
2. Population density is 6700 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?
6200 people/km²
Density drop = 4 × 125 = 500; 6700 − 500 = 6200 people/km².
3. Population density is 3200 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 7 km from the centre?
2325 people/km²
Density drop = 7 × 125 = 875; 3200 − 875 = 2325 people/km².
4. Population density is 9000 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 7 km from the centre?
7250 people/km²
Density drop = 7 × 250 = 1750; 9000 − 1750 = 7250 people/km².
5. Population density is 9000 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?
8400 people/km²
Density drop = 3 × 200 = 600; 9000 − 600 = 8400 people/km².
6. Population density is 6800 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?
4800 people/km²
Density drop = 10 × 200 = 2000; 6800 − 2000 = 4800 people/km².
7. Population density is 6700 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 7 km from the centre?
4950 people/km²
Density drop = 7 × 250 = 1750; 6700 − 1750 = 4950 people/km².
8. Population density is 4500 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 3 km from the centre?
3750 people/km²
Density drop = 3 × 250 = 750; 4500 − 750 = 3750 people/km².
9. Population density is 4400 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?
2150 people/km²
Density drop = 9 × 250 = 2250; 4400 − 2250 = 2150 people/km².
10. Population density is 6000 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?
5250 people/km²
Density drop = 10 × 75 = 750; 6000 − 750 = 5250 people/km².
11. Population density is 4800 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?
4700 people/km²
Density drop = 2 × 50 = 100; 4800 − 100 = 4700 people/km².
12. Population density is 8300 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?
7600 people/km²
Density drop = 7 × 100 = 700; 8300 − 700 = 7600 people/km².

12 questions · Seed 47 · 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 7600 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?
7600 · 100 · 4 km · Per-capita water consumption
2. Population density is 6700 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?
6700 · 125 · 4 km · Per-capita water consumption
3. Population density is 3200 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 7 km from the centre?
3200 · 125 · 7 km · Per-capita water consumption
4. Population density is 9000 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 7 km from the centre?
9000 · 250 · 7 km · Per-capita water consumption
5. Population density is 9000 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?
9000 · 200 · 3 km · Per-capita water consumption
6. Population density is 6800 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?
6800 · 200 · 10 km · Per-capita water consumption
7. Population density is 6700 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 7 km from the centre?
6700 · 250 · 7 km · Per-capita water consumption
8. Population density is 4500 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 3 km from the centre?
4500 · 250 · 3 km · Per-capita water consumption
9. Population density is 4400 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?
4400 · 250 · 9 km · Per-capita water consumption
10. Population density is 6000 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?
6000 · 75 · 10 km · Per-capita water consumption
11. Population density is 4800 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?
4800 · 50 · 2 km · Per-capita water consumption
12. Population density is 8300 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?
8300 · 100 · 7 km · Per-capita water consumption

12 questions · Seed 47 · 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 7600 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?
7200 people/km²
Density drop = 4 × 100 = 400; 7600 − 400 = 7200 people/km².
2. Population density is 6700 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?
6200 people/km²
Density drop = 4 × 125 = 500; 6700 − 500 = 6200 people/km².
3. Population density is 3200 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 7 km from the centre?
2325 people/km²
Density drop = 7 × 125 = 875; 3200 − 875 = 2325 people/km².
4. Population density is 9000 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 7 km from the centre?
7250 people/km²
Density drop = 7 × 250 = 1750; 9000 − 1750 = 7250 people/km².
5. Population density is 9000 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?
8400 people/km²
Density drop = 3 × 200 = 600; 9000 − 600 = 8400 people/km².
6. Population density is 6800 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?
4800 people/km²
Density drop = 10 × 200 = 2000; 6800 − 2000 = 4800 people/km².
7. Population density is 6700 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 7 km from the centre?
4950 people/km²
Density drop = 7 × 250 = 1750; 6700 − 1750 = 4950 people/km².
8. Population density is 4500 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 3 km from the centre?
3750 people/km²
Density drop = 3 × 250 = 750; 4500 − 750 = 3750 people/km².
9. Population density is 4400 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?
2150 people/km²
Density drop = 9 × 250 = 2250; 4400 − 2250 = 2150 people/km².
10. Population density is 6000 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?
5250 people/km²
Density drop = 10 × 75 = 750; 6000 − 750 = 5250 people/km².
11. Population density is 4800 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?
4700 people/km²
Density drop = 2 × 50 = 100; 4800 − 100 = 4700 people/km².
12. Population density is 8300 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?
7600 people/km²
Density drop = 7 × 100 = 700; 8300 − 700 = 7600 people/km².

12 questions · Seed 47 · Age guidance, not curriculum certification