water in canal 300cm wide and 120cm deep, is flowing with a speed of 20kmph how much area will it irrigate in 30 min with 2 cm of standing water
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width 300cm=3m
depth 120cm=1.2m
speed of canal 20km/h
20×1000m/h
vol. of water flow in 1 hour = width of canal ×depth of canal ×speef of canal water
3×1.2×20×1000=72000m3
in 20 in vol. of water flows = 72000×20÷60=24000m3
area irrigated in 20 min 2400÷0.08=300000m2
30 hectare
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