SSC MTS 2 Aug 2019 Shift 3 Paper

Question : 31 of 100

Marks: +1, -0

Pipe P can fill a tank alone in 7 hours. Pipe Q can fill the same tank alone in 13 hours. In how much time can they together fill the tank?

Solution:

Short Trick:

Time required to fill the tank will be = 91/20
Detailed Solution:
Together fill the tank by Pipe P and Pipe Q

={\T_1×\T_2}/{\T_1+\T_2}

⇒ Together fill the tank by Pipe P and Pipe Q =

{7×13}/{7+13}=91/20

⇒ Together fill the tank by Pipe P and Pipe Q

=4{11/20}

hours
⇒ Together fill the tank by Pipe P and Pipe Q = 4 hours 33 minutes
∴ Together fill the tank by Pipe P and Pipe Q is 4 hours 33 minutes.

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