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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 5200 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 2 km from the centre?
5200 · 250 · 2 km · Per-capita water consumption
2. Population density is 3700 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 4 km from the centre?
3700 · 175 · 4 km · Per-capita water consumption
3. Population density is 4000 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?
4000 · 125 · 4 km · Per-capita water consumption
4. Population density is 3500 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 7 km from the centre?
3500 · 75 · 7 km · Per-capita water consumption
5. Population density is 4600 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 9 km from the centre?
4600 · 200 · 9 km · Per-capita water consumption
6. Population density is 7900 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 3 km from the centre?
7900 · 50 · 3 km · Per-capita water consumption
7. Population density is 8800 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?
8800 · 125 · 3 km · Per-capita water consumption
8. Population density is 5000 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 10 km from the centre?
5000 · 50 · 10 km · Per-capita water consumption
9. Population density is 4600 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?
4600 · 75 · 10 km · Per-capita water consumption
10. Population density is 7900 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 2 km from the centre?
7900 · 100 · 2 km · Per-capita water consumption
11. Population density is 3300 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?
3300 · 250 · 10 km · Per-capita water consumption
12. Population density is 5400 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 8 km from the centre?
5400 · 125 · 8 km · Per-capita water consumption

12 questions · Seed 45 · 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 5200 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 2 km from the centre?
4700 people/km²
Density drop = 2 × 250 = 500; 5200 − 500 = 4700 people/km².
2. Population density is 3700 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 4 km from the centre?
3000 people/km²
Density drop = 4 × 175 = 700; 3700 − 700 = 3000 people/km².
3. Population density is 4000 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?
3500 people/km²
Density drop = 4 × 125 = 500; 4000 − 500 = 3500 people/km².
4. Population density is 3500 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 7 km from the centre?
2975 people/km²
Density drop = 7 × 75 = 525; 3500 − 525 = 2975 people/km².
5. Population density is 4600 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 9 km from the centre?
2800 people/km²
Density drop = 9 × 200 = 1800; 4600 − 1800 = 2800 people/km².
6. Population density is 7900 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 3 km from the centre?
7750 people/km²
Density drop = 3 × 50 = 150; 7900 − 150 = 7750 people/km².
7. Population density is 8800 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?
8425 people/km²
Density drop = 3 × 125 = 375; 8800 − 375 = 8425 people/km².
8. Population density is 5000 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 10 km from the centre?
4500 people/km²
Density drop = 10 × 50 = 500; 5000 − 500 = 4500 people/km².
9. Population density is 4600 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?
3850 people/km²
Density drop = 10 × 75 = 750; 4600 − 750 = 3850 people/km².
10. Population density is 7900 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 2 km from the centre?
7700 people/km²
Density drop = 2 × 100 = 200; 7900 − 200 = 7700 people/km².
11. Population density is 3300 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?
800 people/km²
Density drop = 10 × 250 = 2500; 3300 − 2500 = 800 people/km².
12. Population density is 5400 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 8 km from the centre?
4400 people/km²
Density drop = 8 × 125 = 1000; 5400 − 1000 = 4400 people/km².

12 questions · Seed 45 · 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 5200 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 2 km from the centre?
5200 · 250 · 2 km · Per-capita water consumption
2. Population density is 3700 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 4 km from the centre?
3700 · 175 · 4 km · Per-capita water consumption
3. Population density is 4000 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?
4000 · 125 · 4 km · Per-capita water consumption
4. Population density is 3500 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 7 km from the centre?
3500 · 75 · 7 km · Per-capita water consumption
5. Population density is 4600 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 9 km from the centre?
4600 · 200 · 9 km · Per-capita water consumption
6. Population density is 7900 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 3 km from the centre?
7900 · 50 · 3 km · Per-capita water consumption
7. Population density is 8800 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?
8800 · 125 · 3 km · Per-capita water consumption
8. Population density is 5000 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 10 km from the centre?
5000 · 50 · 10 km · Per-capita water consumption
9. Population density is 4600 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?
4600 · 75 · 10 km · Per-capita water consumption
10. Population density is 7900 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 2 km from the centre?
7900 · 100 · 2 km · Per-capita water consumption
11. Population density is 3300 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?
3300 · 250 · 10 km · Per-capita water consumption
12. Population density is 5400 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 8 km from the centre?
5400 · 125 · 8 km · Per-capita water consumption

12 questions · Seed 45 · 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 5200 people/km² in the city centre and falls by 250 people/km² for each kilometre outward. What is the density 2 km from the centre?
4700 people/km²
Density drop = 2 × 250 = 500; 5200 − 500 = 4700 people/km².
2. Population density is 3700 people/km² in the city centre and falls by 175 people/km² for each kilometre outward. What is the density 4 km from the centre?
3000 people/km²
Density drop = 4 × 175 = 700; 3700 − 700 = 3000 people/km².
3. Population density is 4000 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?
3500 people/km²
Density drop = 4 × 125 = 500; 4000 − 500 = 3500 people/km².
4. Population density is 3500 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 7 km from the centre?
2975 people/km²
Density drop = 7 × 75 = 525; 3500 − 525 = 2975 people/km².
5. Population density is 4600 people/km² in the city centre and falls by 200 people/km² for each kilometre outward. What is the density 9 km from the centre?
2800 people/km²
Density drop = 9 × 200 = 1800; 4600 − 1800 = 2800 people/km².
6. Population density is 7900 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 3 km from the centre?
7750 people/km²
Density drop = 3 × 50 = 150; 7900 − 150 = 7750 people/km².
7. Population density is 8800 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?
8425 people/km²
Density drop = 3 × 125 = 375; 8800 − 375 = 8425 people/km².
8. Population density is 5000 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 10 km from the centre?
4500 people/km²
Density drop = 10 × 50 = 500; 5000 − 500 = 4500 people/km².
9. Population density is 4600 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?
3850 people/km²
Density drop = 10 × 75 = 750; 4600 − 750 = 3850 people/km².
10. Population density is 7900 people/km² in the city centre and falls by 100 people/km² for each kilometre outward. What is the density 2 km from the centre?
7700 people/km²
Density drop = 2 × 100 = 200; 7900 − 200 = 7700 people/km².
11. Population density is 3300 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?
800 people/km²
Density drop = 10 × 250 = 2500; 3300 − 2500 = 800 people/km².
12. Population density is 5400 people/km² in the city centre and falls by 125 people/km² for each kilometre outward. What is the density 8 km from the centre?
4400 people/km²
Density drop = 8 × 125 = 1000; 5400 − 1000 = 4400 people/km².

12 questions · Seed 45 · Age guidance, not curriculum certification