CMAT 2018 Solved Question Paper

Question : 23 of 100

Marks: +1, -0

Two pipes A and B can fill a cistern in 120 min and 150 min, respectively. There is also an outlet C. If all the three pipes are opened together, the cistern gets filled in 100 min. How much time will be taken by C to empty the tank?

2 h 40 min
3 h 20 min
3 h
3 h 40 min

Validate

Solution:

Work done by C in 1 min
=

1/{120}+1/{150}+1/{100}

{5 + 4 -6 }/{600}

3/{600}

1/{200}

Hence, C will empty the full tank in 200 min
= 200 min = 3 h 20 min

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