Answers

2016-03-31T12:28:22+05:30
12m
area of cross section(cm)×rate of water flow(cm/min)
=area of rectangle(cm)×h
5×9×20×100×40×60=720×250×h
h=(5×9×20×100×40×60)÷( 720×250)
h=1200cm
h=12 m

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