7. Water runs into a cylindrical tank, of diameter 4 m and height 5 m , through a pipe of radius 2 cm,
at the rate of 1/10 m per second . Find the time taken by the tank to fill up .
(A) 150 hr
(B) 150 hr 50 min 50 sec
(C) 138 hr 53 min 20 sec
(D) 100 hr 50 min
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Hey mate .. Option c is the right asn and gere is its detail...
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option c is correct .........
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