This is the very-short answer problem.
Problem from RS Aggarwal book, problem number 1, page number 826, exercise 17D, chapter volume and surface area of solid.
Chapter Mensuration
Deepak BoraNewbie
A river 1.5 m deep and 36 m wide is flowing at the rate of 3.5 km/hr. Find the amount of water in cubic meters that runs into the sea per minute
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solution
given data
Depth of the river, h=1.5 m
Width of the river, b=36 m
Speed of the flowing water, l=3.5 km/hr=3.5×1000 m/60 min
=1753 m/min
The amount of water that runs into the sea per
=1753×36×1.5
=3150 m³/min
∴ the amount of water that runs into the sea per minute is 3150 m³/min