Pipes and Cisterns Practice Test 2 with solutions

Question : 3 of 40

Marks: +1, -0

A cistern is connected with three pipes A, B and C. A takes twice as much as time taken by B and C takes thrice as much time taken by B. If all together fill the cistern in 12 minutes find the time taken by A alone to fill the cistern.

44 minutes
52 minutes
40 minutes
39 minutes
35 minutes

Validate

Solution:

Let B takes ‘x’ time.
A will take ‘2x’ time and C will take ‘3x’ time.
Now

1/x + 1/{2x}+1/{3x}

1/{12}

1/x[1+1/2+1/3]

1/{12}

1/x[{11}/6]

1/{12}

x = 22
Time taken by A = 2x = 44 minutes

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