# 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

• 12π cm3

• 15π cm3

• 16π cm3

•  20π cm3

#### Solution

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