Water in a canal 1.5 m wide and 6 m deep is flowing with a speed of 10 km/hr. How much area will it irrigate in 30 minutes if 8 cm of standing water is desired?
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Breadth = 1.5m
Height = 6m
10 Km : 1 hr
10000m : 60 minutes
Therefore, 5000m : 30 minutes
Thus, length = 5000m
Now,
Volume of the canal = Area irrigated × Height
l × b × h = A × H
5000 × 1.5 × 6 = A × 8/100
A = 5000 × 1.5 × 6 × 100/ 8
A = 562500 m^2
Therefore, it will irrigate an area of 562500 m^2 of the field.
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