Question

3 pumps of the same capacity can fill the pool in 15 hours.How long will 5 pumps of the same capacity will take to fill the pool ?

Answer 1

3 pumps can fill it in = 15 hours

1 pump will fill it in = 15 to 3 hours

So 5 pumps will fill it in = 15 to 3÷5

9 hours