Time and Work
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Q.

Water flows into a reservoir which is 200 m long and 150 m wide, through a pipe of cross-section (0.3m x 0.2m) at 20 kmph. In what time will the water level be 8?

 A.

100 hrs

 B.

150 hrs

 C.

175 hrs

 D.

200 hrs

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Solution:
Option(D) is correct

Volume of water collected in the tank in $1$ hour

$⇒ 0.3×0.2×20×1000=1200$ m cubic 

If after $t$ hours, the water is at height of 8m, 

$1200t=200×150×8$

$⇒ t$ = 200 Hours.


(1) Comment(s)


Abdul
 ()

Option(D) is correct

Volume of water collected in the tank in $1$ hour

$⇒ 0.3×0.2×20×1000=1200$ m cubic

If after $t$ hours, the water is at height of 8m,

$1200t=200×150×8$

$⇒ t$ = 200 Hours.