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

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

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Solution

Rate of water flow = 2 km per hour

`=(2000/60)"m/min"`

`=(100/3)"m/min"`

Depth (h) of river = 3 m

Width (b) of river = 40 m

`"Volume of water flowed in 1 min "=(100/3xx40xx3)m^3=4000m^3`

Therefore, in 1 minute, 4000 m3 water will fall in the sea.

Concept: Volume of a Cuboid
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APPEARS IN

NCERT Class 9 Maths
Chapter 13 Surface Area and Volumes
Exercise 13.5 | Q 9 | Page 228
RD Sharma Mathematics for Class 9
Chapter 18 Surface Areas and Volume of a Cuboid and Cube
Exercise 18.2 | Q 22 | Page 31

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