Question

A river 3m
deep and 40m wide is flowing at the rate of 2km per hour. How much water will
fall into the sea in a minute?

Answer 1

Width of the rive = 40 m, depth of the river = 3m
Length of water that falls into the sea in a minute
$= ((2000)/(60)) m = (100)/(3) m$
Volume of water that falls into the sea in a minute
= (length $xx$ width $xx$ depth)
$= ((100)/(3) xx 40 xx 3) m^(3) = 4000 m^(3)$