SSC CGL Tier II 12 Apr 2015 Paper

Question : 92 of 100

Marks: +1, -0

A tank has two pipes. The first pipe can fill it in 4 hours and the second can empty it in 16 hours. If two pipes be opened together at a time, then the tank will be filled in

$5 1/ 2$ hours
10 hours
6 hours
$5 1/ 3$ hours

Validate

Solution:

(4) Part of tank filled by both the pipes in 1 hour

= {1}/{4}- {1}/{16}

= {4-1}/{16}= {3}/{16}

∴ Required time

=16/3 =5 1/3

hours

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