Pipes and Cisterns Practice Test 2 with solutions

Question : 4 of 40

Marks: +1, -0

A tank is connected with three pipes L, M and N. Pipe L can fill the tank in as much time taken by M and N together. Pipes L and M together can fill the tank in

9 3/4

minutes and Pipe N alone can fill the tank in 48 minutes. Find the time taken by Pipe L alone to fill the tank.

10 minutes
$11 1/{11}$ minutes
16 minutes
$12 1/2$ minutes
None of these

Validate

Solution:

Work done by ‘L’ alone is equal to the work done by both M and N together.
So, L = M + N
⇒ L - M + N
Work done by N in one minute =

1/{48}

So, L - M =

1/{48}

... (1)
Work done by L and M in one minute =

5/{48}

......(2)
Adding (1) and (2) we get,
L =

1/{16}

So, L alone can fill the tank in 16 minutes

Go to Question:

Prev Question

Next Question