Answer :

Volume of the water flown in 9 hours = (120 x 75 x 1.2)m

Volume of water flown in one hour = m

Area of the mouth of the square pipe = = 0.04m

Speed of water per hour= = 30, 000 m

.

^{3 }Volume of water flown in one hour = m

^{3}Area of the mouth of the square pipe = = 0.04m

^{2}Speed of water per hour= = 30, 000 m

.

^{.}. Hence speed of water flowing in the reservoir = 30 km/hourRate this question :

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