Water flows into a tank 100 m x 150 m x 2 m through a rectangular pipe 1.5 m x 1.25 m at a speed of 20 km/h. In what time, will the water rise by 2 m?
Correct Answer: 48 min
Explanation:
Volume of water in the tank = 100 x 500 x 2 = 30000 m3
Speed of water = 20 x 1000/60 = 1000/3 m/min
water flow per minute = (15/10) x (125/100) x (1000/3) = 625 m3
Time taken = 30000/625 = 48 min
