Question

Water in a canal,5.4m wide and 1.8m deep ,is flowing with a speed of 25km/hour . How much area it can irrigate in 40 minutes,if 10 cm of standing water is required for irrigation?

Answer 1

b= 5.4 mh=1.8m
v= 25 km/htherefore, l=25km per hourtherefore water that would be flowing in 40 minutes=40*25/60=50/3km=50000/3m
area of irrigation= area water flowing in 40minutesvolume of water which irrigates the land= volume water flowing from canal in 40 minutes
and 10 cm or 1/10 m of standing water is required for irrigationtherefore,l*b*h=L*B*Hl*b*1/10=50000/3*5.4*1.8l*b=300000*5.4l*b=16200000sq. mtherefore, area to be irrigated when 10 cm of standing water is required=16200000sq. m
hope it helps u!

Answer 2

is this right or wrong.....