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A Right Triangle with Sides 3 Cm, 4 Cm and 5 Cm is Rotated About the Side of 3 Cm to Form a Cone. the Volume of the Cone So Formed is - Mathematics

MCQ

A right triangle with sides 3 cm, 4 cm and 5 cm is rotated about the side of 3 cm to form a cone. The volume of the cone so formed is

Options

  • 12π cm3

  • 15π cm3

  • 16π cm3

  •  20π cm3

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Solution

Radius of cone VAOB

r = 4 cm

Height of cone VAOB

h = 3 cm

The volume of cone VAOB

`=1/3 pi r^2 h`

`=1/3pi(3)^2 xx 4`

`=12 pi cm^3`

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APPEARS IN

RD Sharma Class 10 Maths
Chapter 14 Surface Areas and Volumes
Q 17 | Page 89
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