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Surface Areas And Volumes

Question 8:

Water in canal, 6 m wide and 1.5 m deep, is flowing with a speed of 10 km/h. how much area will it irrigate in 30 minutes, if 8 cm of standing water is needed?

Answer:

Consider an area of cross-section of canal as ABCD.

Area of cross-section = 6 × 1.5 = 9 m2

Speed of water = 10 km/h =

Volume of water that flows in 1 minute from canal ...

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