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Water is flowing at the rate of 5 km/hour through a pipe of diameter 14 cm into a tank with rectangular base which is 50 m long and 44 m wide. Find the time in which the level of water tank rises by 7 cm. (Use `pi = 22/7` )

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The correct Answer is:
The total time needed to rise the level of tank by 7 cm is 2 hours.
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