NCHMCT JEE 2016 Question Paper with solutions for online practice

Question : 16 of 200

Marks: +1, -0

Two pipes A and B can fill a tank in 24 min. and 32 min. respectively. If both the pipes are opened simultaneously, after how much time B should be closed so that the tank is full in 18 minutes?

Validate

Solution:

In 18 minutes the part filled by pipe A
= 18 ×

1/{24}

3/4

Remaining part = 1 -

3/4

1/4

Time taken by B to fill the remaining part
=

{1/4}/{1/{32}}

1/4 × {32}/1

= 8 minutes

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