Water in a canal ,6 m wide and 1.5 m deep,is flowing with a speed of 10 km/h . how much area will it irrigate in 30 minutes, if 8 cm of standing water is needed?
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vol
=45000______________1
vol
=a*8/10__________________2
from 1 and 2
a*8/10=45000
a=562500
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