water in a canal 6mwide and 1.5m deep,is flowing with a speed of 10km/h.how much area will it irrigate in 30 minutes,if 8cm of standing water is needed?
The amount of water flowing thru' the canal in half hour
=6*1.5*5000 cubic meter.(in 1 hr 10,000 meter, so in half hour,5000 meter.)
This volume =A*0.08 meter(A is the required area and 0.08 meter=8 cm = required standing height)
Solve this equation to get A.
That will be the answer.