Answer :

Given,


Speed of the water flowing through the pipe, H = 6 km/hr


= cm/s


Diameter of the pipe = 14 cm


Radius (R) of pipe = = 7 cm


Length (l) of the rectangular tank = 60 m = 6000 cm,


Breadth (b) of the rectangular tank = 22 m = 2200 cm and


Height (h) or Rise in the level of water in the tank = 7 cm


Now,


Volume of the water in rectangular tank = l × b × h = 6000 x 2200 x 7 = 92400000cm3


Also,


Volume of the water flowing through the pipe in 1 s = πR2H


= cm3


So,


The time taken to rise the water =


cm3


= 92400 x = 3600s = 1 hr


So,


In 1 hour time the level of water in the tank will rise by 7cm.


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