Question

Pipe a can fill a tank in 8 hours, pipe b in 4 hours and pipe c in 24 hours. If all the pipes are open, in how many hours will the tank be filled?

Answer 1

Answer:

2.4hrs

Step-by-step explanation:

Pipe a can fill 1/8th of the tank in an hour.

Pipe b can fill 1/4th of the tank in an hour.

Pipe c can fill 1/24th of the tank in an hour.

Hence together they can fill (1/8+1/4+1/24)th of the tank in an hour = 10/24th

=10/24*24/10(to make one whole)

Which means they will take =24/10=2.4hrs to fill the tank.