UPSC 2014 CDS II Math Paper

Let the volume of the tank be V. Volume of the tank filled by the pipe in 1h=

V

3

Volume of the tank filled by the pipe with leakage in 1h=

V

3.5

∴ Volume of water leaked in 1h=

V

3

−

V

3.5

=

0.5

3×3.5

V=

V

21

So, the time taken by the leakage toempty the tank =

V

( V 21 )

=21h