Water flows into a tank which is 200 m long and 150 m wide through a pipe of cross section 0 3m x 0 ...........

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Water flows into a tank which is 200 m long and 150 m wide, through a pipe of cross-section (0.3m x 0.2m) at 20 km/h. In what time will the water level be 12m ?

200 hrs

240 hrs

300 hrs

270 hrs

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Explanation:

Volume of water collected in the tank in 1 hour
⇒ (0.3 × 0.2 × 20km × 1000mts) = 1200 m cubic
If after t hours, the water is at height of 12m,
1200t=200×150×12
⇒ t = 300 Hours.