The water in a rectangular tank having a base 80 m by 60 m is 6 5 m deep In what time can the water ...........

Quantitative Aptitude ( CCS) Mensuration 3D

The water in a rectangular tank having a base 80 m by 60 m is 6.5 m deep. In what time can the water be emptied by a pipe of which the cross-section is a square of side 20 cm, if the water runs through the pipe at the rate of 20 km per hour?

39hrs

45hrs

60hrs

40hrs

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Explanation:

Volume of water in the tank is 80*60*6.5=31200m³
Then Volume of water flown in 1hr is
20*1000(in meter)*20/100*20/100(in meter)=800m³
Time taken=31200/800=39hrs