Question

21 pumps can empty a water take in 36 hours . how many hours would 56 pumps take to do the same work .​

Answer 1

Answer:

96 hrs..

Step-by-step explanation:

21 pumps =36 hrs

56 pumps = x

we should take a proportion....

so, 21*36=56*x

21*x=36*56

21x =2016

x=2016/21

x=96

so, hours needed to empty 56 pumps = 96 hours