Question

It takes 14 hours for a tap with a flow of 18 litres per minute to fill a reservoir with water. How long will it take if its flow is reduced to 7 litres per minutes?

Answer 1

Since we know the rate to fill the reservoir, let's figure out how much water is required:

18 litres/minute × 14 hours × 60 minutes/hour = 15120 litres

Now, divide this value by our new rate, and this should give the time required to fill it, which is:

2160 minutes

Converting it from minutes to hours, the answer is 36 hours.

Answer 2

Answer: 36 hours

Explanation:

Using inverse variation,

7x=14x18

7x=252

x=252/7=36

Therefore, Time taken = 36 hours.