Water in a canal, 30 dm wide and 12m deep, is flowing with a velocity of 20 km / hr. How much area will it irrigate in 30 min, if 9cm of standing water is desired?
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It will be easier if we convert every value to metres.
Width of canal = 30dm = 3m Depth of canal = 12m
Velocity of water in canal = 20km/hr = 20000m/hr = 10000m/30 min
Hence, area irrigated in 30 min = 3 x 12 x 10000/ 0.9
= 40 x 10000 = 400000 sq. metres
Therefore, 400000 sq. metre area will be irrigated in 30 mins.
Width of canal = 30dm = 3m Depth of canal = 12m
Velocity of water in canal = 20km/hr = 20000m/hr = 10000m/30 min
Hence, area irrigated in 30 min = 3 x 12 x 10000/ 0.9
= 40 x 10000 = 400000 sq. metres
Therefore, 400000 sq. metre area will be irrigated in 30 mins.
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