Question

PRACTICE SET 9.2
(Texwoon page.
1. The perpendicular height of a cone is 12 cm and its
slant height is 13 cm. Find the radius of the base of
the cone.
Solution : Here, h=12 cm, 1 = 13 cm, r= ?
2 =p2 +h²
... (Formula)
:. (13)2 = p2 +(12)
:: 169 = p2 + 144
:. 169 – 144 = r2 . p2 = 25
:. r=5 cm
Ans. The radius of the base of the cone is 5 cm.
126​

Answer 1

It seems correct.

Just elaborate it.