Water flows into a tank which is 200m long and 150m wide through a pipe of cross section 0 3m 0 2m a...........

Quantitative Aptitude ( CCS) Mensuration 2D

Water flows into a tank which is 200m long and 150m wide, through a pipe of cross-section 0.3m * 0.2m at 20 km/hour. Then the time (in hours) for the water level in the tank to reach 8m is

180hrs

135hrs

200 hrs

160hrs

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Explanation:

speed of water = 20 km/hour
= 20000 m/hour
Area of base = 0.3m × 0.2m
= 0.06 sq. meter
Volume of water flows in 1 hour = area of base× speed of water in 1 hour
= 0.06 × 20000
= 1200 cubic meter
Volume of tank up to 8 m height = 200 × 150 ×
= 240000 cubic meter
Time to reach the water 8 m high = 240000/1200
= 200 hrs.