Question

Three pipes A, B and C can fill an empty tank
in 15 hours, 10 hours and 6 hours, respectively.
In how much time will the tank be filled if all
the three pipes work together?​

Answer 1

Answer:

3 hours

Step-by-step explanation:

Tank filled by pipe A in 1 hour = 1/15

Tank filled by pipe B in 1 hour = 1/10

Tank filled by pipe C in 1 hour = 1/6

Tank filled by all the pipes in 1 hour = 1/15+1/10+1/6

=2+3+5/30=10/30=1/3

So time taken by all the pipes = 3 hours