Question 9 - Volume of Cube and Cuboid - Chapter 11 Class 9 Surface Areas and Volumes

Last updated at April 16, 2024 by

Ex 13.5, 9 - A river 3 m deep and 40 m wide is flowing - Volume Of Cube/Cuboid

Ex 13.5, 9 - Chapter 13 Class 9 Surface Areas and Volumes - Part 2

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Question 9 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? Water flowing in river in 1 hour = 2 km Water flowing in river in 1 hour = 2000 m Water flowing in river in 60 minutes = 2000 m Water flowing in river in 1 minute = 2000/60 m = 100/3 m Now, River is in shape of cuboid Length = 100/3 m Breadth = 40 m Height = 3 m ∴ Volume of water falling in the sea in 1 minute = Volume of the cuboid = Length × Breadth × Height = (100/3×40×3) m3 = (100 × 40 × 1) m3 = 4000 m3

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo