Chap 9.2 RATE (L3) CONSTANT Rate vs AVERAGE Rate
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S1-01
S1-02
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S1-09
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Average Rate
Constant Rate
1. The rate of petrol consumptions is 10 km per litre
2. The tap filled the tank at the rate of 11.5 litres per minute
3. Mary washes 18 dishes per minute
4. The mountain climber climbed at the rate of 42 m/h
5. Cycling burns 670 calories per hour
6. A petrol pump delivers petrol at the rate of 0.5 litres per second
7. The temperature drops at the rate of 2 degree Celsius per hour
8. A company pays workers at the rate of $9/h
9. The monthly rental charges of an office is $2.50 per square metre
10. The rainforest has been destroyed at the rate of 14,000 square km per year
11. The birth rate of the country is 18.4 babies per 1,000 people
12. The population of a city was decreasing at the rate of 15,000 per year for the past 10 years
13. The printer prints at the rate of 12 pages per minute
14. Electricity is charged at the rate of 20 cents per kWh
15. Water consumption is charged at the rate of $1.20 per cubic metre
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