Question

12 pumps working 6 hours a day can empty a completely filled reservoir in 15 days. How many such pumps working 9 hours a day will empty the same reservoir in 12 days.

Answer 1

Answer:

Let x be the required Pumps

Pump-----Hours ---- Day

12............6.............15

X................9..............12

x =6/9x15/12x12 = 10 Pumps

10 pumps are required to empty

the reservoir