Our worldAges 16-18

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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Age band:Ages 13-15 Ages 16-18

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Worksheet StudioPractice pack · Ages 16-18

Per-capita water consumption

Take your time. Show your thinking.

1. Population density is 6700 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?
6700 · 125 · 6 km · Per-capita water consumption
2. Population density is 3500 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?
3500 · 175 · 7 km · Per-capita water consumption
3. Population density is 7600 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?
7600 · 225 · 2 km · Per-capita water consumption
4. Population density is 3100 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?
3100 · 75 · 4 km · Per-capita water consumption
5. Population density is 6600 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 8 km from the centre?
6600 · 75 · 8 km · Per-capita water consumption
6. Population density is 7600 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?
7600 · 75 · 10 km · Per-capita water consumption
7. Population density is 7200 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?
7200 · 225 · 4 km · Per-capita water consumption
8. Population density is 3300 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?
3300 · 75 · 6 km · Per-capita water consumption
9. Population density is 8100 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 10 km from the centre?
8100 · 225 · 10 km · Per-capita water consumption
10. Population density is 6000 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?
6000 · 225 · 7 km · Per-capita water consumption
11. Population density is 5800 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?
5800 · 250 · 6 km · Per-capita water consumption
12. Population density is 3600 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
3600 · 50 · 4 km · Per-capita water consumption

12 questions · Seed 44 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 16-18

Per-capita water consumption

Answers and reasoning. Review before teaching.

1. Population density is 6700 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?
5950 people/km²
Density drop = 6 × 125 = 750; 6700 − 750 = 5950 people/km².
2. Population density is 3500 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?
2275 people/km²
Density drop = 7 × 175 = 1225; 3500 − 1225 = 2275 people/km².
3. Population density is 7600 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?
7150 people/km²
Density drop = 2 × 225 = 450; 7600 − 450 = 7150 people/km².
4. Population density is 3100 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?
2800 people/km²
Density drop = 4 × 75 = 300; 3100 − 300 = 2800 people/km².
5. Population density is 6600 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 8 km from the centre?
6000 people/km²
Density drop = 8 × 75 = 600; 6600 − 600 = 6000 people/km².
6. Population density is 7600 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?
6850 people/km²
Density drop = 10 × 75 = 750; 7600 − 750 = 6850 people/km².
7. Population density is 7200 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?
6300 people/km²
Density drop = 4 × 225 = 900; 7200 − 900 = 6300 people/km².
8. Population density is 3300 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?
2850 people/km²
Density drop = 6 × 75 = 450; 3300 − 450 = 2850 people/km².
9. Population density is 8100 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 10 km from the centre?
5850 people/km²
Density drop = 10 × 225 = 2250; 8100 − 2250 = 5850 people/km².
10. Population density is 6000 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?
4425 people/km²
Density drop = 7 × 225 = 1575; 6000 − 1575 = 4425 people/km².
11. Population density is 5800 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?
4300 people/km²
Density drop = 6 × 250 = 1500; 5800 − 1500 = 4300 people/km².
12. Population density is 3600 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
3400 people/km²
Density drop = 4 × 50 = 200; 3600 − 200 = 3400 people/km².

12 questions · Seed 44 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Per-capita water consumption

Take your time. Show your thinking.

1. Population density is 6700 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?
6700 · 125 · 6 km · Per-capita water consumption
2. Population density is 3500 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?
3500 · 175 · 7 km · Per-capita water consumption
3. Population density is 7600 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?
7600 · 225 · 2 km · Per-capita water consumption
4. Population density is 3100 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?
3100 · 75 · 4 km · Per-capita water consumption
5. Population density is 6600 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 8 km from the centre?
6600 · 75 · 8 km · Per-capita water consumption
6. Population density is 7600 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?
7600 · 75 · 10 km · Per-capita water consumption
7. Population density is 7200 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?
7200 · 225 · 4 km · Per-capita water consumption
8. Population density is 3300 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?
3300 · 75 · 6 km · Per-capita water consumption
9. Population density is 8100 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 10 km from the centre?
8100 · 225 · 10 km · Per-capita water consumption
10. Population density is 6000 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?
6000 · 225 · 7 km · Per-capita water consumption
11. Population density is 5800 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?
5800 · 250 · 6 km · Per-capita water consumption
12. Population density is 3600 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
3600 · 50 · 4 km · Per-capita water consumption

12 questions · Seed 44 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Per-capita water consumption

Answers and reasoning. Review before teaching.

1. Population density is 6700 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?
5950 people/km²
Density drop = 6 × 125 = 750; 6700 − 750 = 5950 people/km².
2. Population density is 3500 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?
2275 people/km²
Density drop = 7 × 175 = 1225; 3500 − 1225 = 2275 people/km².
3. Population density is 7600 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?
7150 people/km²
Density drop = 2 × 225 = 450; 7600 − 450 = 7150 people/km².
4. Population density is 3100 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?
2800 people/km²
Density drop = 4 × 75 = 300; 3100 − 300 = 2800 people/km².
5. Population density is 6600 people/km² in the city centre and falls by 75 people/km² for each kilometre outward. What is the density 8 km from the centre?
6000 people/km²
Density drop = 8 × 75 = 600; 6600 − 600 = 6000 people/km².
6. Population density is 7600 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?
6850 people/km²
Density drop = 10 × 75 = 750; 7600 − 750 = 6850 people/km².
7. Population density is 7200 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?
6300 people/km²
Density drop = 4 × 225 = 900; 7200 − 900 = 6300 people/km².
8. Population density is 3300 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?
2850 people/km²
Density drop = 6 × 75 = 450; 3300 − 450 = 2850 people/km².
9. Population density is 8100 people/km² in the city centre and falls by 225 people/km² for each kilometre outward. What is the density 10 km from the centre?
5850 people/km²
Density drop = 10 × 225 = 2250; 8100 − 2250 = 5850 people/km².
10. Population density is 6000 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?
4425 people/km²
Density drop = 7 × 225 = 1575; 6000 − 1575 = 4425 people/km².
11. Population density is 5800 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?
4300 people/km²
Density drop = 6 × 250 = 1500; 5800 − 1500 = 4300 people/km².
12. Population density is 3600 people/km² in the city centre and falls by 50 people/km² for each kilometre outward. What is the density 4 km from the centre?
3400 people/km²
Density drop = 4 × 50 = 200; 3600 − 200 = 3400 people/km².

12 questions · Seed 44 · Age guidance, not curriculum certification