Question

It takes 3 minutes to fill a 60 L bathing pool. What is the average rate in liters per hour

Answer 1

It takes 3 minutes to fill 60L, so it takes 1 hour to fill 1200L.

Answer 2

Answer: 1200 liters per hour.

Explanation:

Given : It takes 3 minutes to fill a 60 L bathing pool.

i.e. capacity of pool = 60 liters

Time taken to fill a 60 L bathing pool= 3 minutes

Then, the average rate in liters per minutes will be :-

`\text{Average rate}=\frac{\text{Capacity of pool}}{\text{Time taken }}*100\\\\ \text{i.e. Average rate}=(60)/(3)\text{ per minute}\\\\\text{i..e Average rate}=20\text{ per minute}`

Since 1 hour = 60 minutes

i.e. 1 minute=
`(1)/(60)`

Then, Average rate in liter per hour =
`(20)/((1)/(60))=20*60\ \text{ liters per hour}=1200\text{ liters per hour}`

Hence, the average rate = 1200 liters per hour.