Question

5 pump are required to fill a tank in 1×2÷2 hours . how many pumps of the fill the tank by 8pumps of the same size

Answer 1

Answer:

Total 1 are required to fill a tank

Answer 2

Answer:

total time = 1hour

for tank feeling required pump =5

then 12 min using 1 pump

so , 8 pump feels in 7 min 4 sec