NCHMCT JEE 2014 Question Paper with solutions for online practice

Question : 26 of 200

Marks: +1, -0

A pipe can fill a tank in 15 hours. Due to a leak in the bottom, it is filled in 20 hours. If the tank is full, how much time will the leak take to empty it?

30 hrs.
40 hrs.
50 hrs.
60 hrs.

Validate

Solution:

Let the tank will be empty in x hrs.
Then, from question,

1/{15}-1/x

1/{20}

1/x

1/{15}-1/{20}

⇒

1/x

{4-3}/{60}

∴ x = 60 hours

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