Mensuration Practice Test 2

Question : 13 of 40

Marks: +1, -0

The perimeter of the base of a right circular cone is 8 cm. If the height of the cone is 21 cm, then its volume is:

Solution:

Parameter of a right circular cone = 8 cm
Radius = ?
2π = 8
r =

8/{2π}

4/π

cm.
Volume =

1/3π^2 h

⇒

1/3 × 17 × 4/π × 4/π × 21

{112}/π cm^3

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