Answer :

Length of the canal = 4km/hr × hr [Distance = Speed × Time]

Length =


Given, width = 6 m, depth = 1.5 m


Volume of water flowing in the canal = l × b × h = × 6 × 1.5


= 6000 m3


Height of standing water = 8 cm = m


Area for irrigation =


=


= 75000 m2


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