जॉइन Examsbookउत्तर : 3. "300 hrs"
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 ?5
प्र: 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 ?
- 1200 hrsfalse
- 2240 hrsfalse
- 3300 hrstrue
- 4270 hrsfalse
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उत्तर : 3. "300 hrs"
व्याख्या :
Answer: C) 300 hrs 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.