Question

A swimming pool can be filled in 4 hours by 8 pumps of the same type. How many such pumps are required if the pool is to be filled in 2 2/3 hours?

Answer 1

A swimming pool can be filled in 4 hours by 8 pumps.

If we want to fill the swimming pool in 1h,

We required 4×8 = 32 pumps 

In 2 2/3 i.e. 8/3 h, the number of pumps required = 32 ÷ 8/3 

= (32 x 3)/8 

= 4 x 3 

= 12 pumps