8. Water in a 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?
Speed of water is: 10 Km/hr
And the volume of water flow in 1 minute is :
Thus the volume of water flow in 30 minutes will be :
Let us assume irrigated area be A. Now we can equation the expression of volumes as the volume will remain the same.
Thus the irrigated area is .
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