The radius of the base and height of a right circular cone are 9 cm and 15 cm respectively. Then volume of the cone is ……… cm^3.
The radius of the base and height of a right circular cone are 9 cm and 15 cm respectively. Then volume of the cone is ……… cm3.
A) 405 π
B) 1215 π
C) 81 π
D) 225 π
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Correct option is: A) 405 π
We have
r = Radius of base of the cone = 9 cm,
h = Height of the cone = 15 cm.
\(\therefore\) Volume of cone = \(\frac 13 \pi r^2 h\) = \(\frac 13 \pi \times 9^2 \times 15\)
= \(81 \times 5 \pi \, cm^3 = 405 \pi \, cm^3\)
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