water in a canal,6m wide and 1.5m deep,is flowing at a speed of 4km\hr.how much will ir irrigate in 10 minutes,if 8cm of standing water is needed of irrigation
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b= 6 m
h=1.5m
v= 4 km/h
therefore, l=4 km per hour
therefore water that would be flowing in 10 minutes=10*4/60=2/3km=2000/3m
area of irrigation= area water flowing in 10 minutes
volume of water which irrigates the land= volume water flowing from canal in 10 minutes
and 8 cm or 1/8 m of standing water is required for irrigation
therefore,
l*b*h=L*B*H
l*b*1/8=2000/3*6*1.5
l*b=48000sq. m
therefore, area to be irrigated when 8 cm of standing water is required=48000 sq. m
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