RRB Paramedical Staff Nurse Model Paper 3

Question : 47 of 100

Marks: +1, -0

A tap can fill a cistern in 8 h and another tap can empty it in 16 h. If both the taps are open, the time in hours) taken to fill the tank will be

Solution:

According to the question.
Part of the cistern filled in

1{h}=\;{1}/{8}

Part of the cistern emptied in

1{h}=\;{1}/{16}

When both the taps are opened simultaneously, part of the cistern filled in

1 {h}

=\;{1}/{8}-\;{1}/{16}

=\;{2-1}/{16}=\;{1}/{16}

Hence, the cistern will be filled in

16 {h}

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