Pipes and Cisterns Practice Test 2 with solutions

Question : 15 of 40

Marks: +1, -0

Three pipes A, B and C can fill a tank in 4, 13 and 52 hr respectively. If all the three pipes are opened simultaneously, how much time will be taken by them to fill it?

$2 8/9$ hours
3 hours
$2 1/3$ hours
$3 2/7$ hours
None of these

Validate

Solution:

Part of tank filled by “A” in 1 hour =

1/4

Part of tank filled by “B” in 1 hour =

1/{13}

Part of tank filled by “C” in 1 hour =

1/{52}

Part of tank filled by (A + B + C) in 1 hour
=

1/4 + 1/{13} + 1/{52}

{13+4+1}/{52}

{18}/{52}

9/{26}

So, time taken by them =

{26}/9

2 8/9

hour.

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