Question: A sharp crested rectangular weir with a crest length of 0 . 8 m is situated in the side of a tank that has vertical

A sharp crested rectangular weir with a crest length of 0.8m is situated in the side of a tank that has vertical walls and which measures 8m by 4m in plan. If the head over the weir reduces from 0.5m to 0.1m and the coefficient of discharge CD=0.6, Calculate the time required to do this?
A sharp crested rectangular weir with a crest

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