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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? - CBSE Class 9 - Mathematics

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ConceptVolume of a Cuboid

#### Question

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?

#### 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.

Is there an error in this question or solution?

#### APPEARS IN

NCERT Solution for Mathematics Class 9 (2018 to Current)
Chapter 13: Surface Area and Volumes
Ex.13.50 | Q: 9 | Page no. 228
RD Sharma Solution for Mathematics for Class 9 by R D Sharma (2018-19 Session) (2018 to Current)
Chapter 18: Surface Areas and Volume of a Cuboid and Cube
Ex.18.20 | Q: 22 | Page no. 31
Solution 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? Concept: Volume of a Cuboid.
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