A rectangular tank is 225 m by 162m at the base with what speed must water flow into it through an aperture 60cm by 45cm that the level may be raised 20cm in 5 hours?
Options:
A . 5000 m/hr
B . 5200m/hr
C . 5400 m/hr
D . 5600 m/hr
Answer: Option C
Volume of water flown in 5 hrs =(225 x 162 x 20/100)m3 =7290 m3 Let the speed of water be x metres/ hr Water flow in 5hrs =(x × 60/100 x 45/100 x 5)m3 =(27x/20)m3 27x/20 = 7290 => x =(7290 x 20/27)m = 5400 m/hr
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