Question

find the curved surface area of a right circular cone of height 15 cm is and base diameter is 16 cm​

Answer 1

Answer:

CSA =pie*r(l+r)

=22/7*8(17+8)=22/7*8(25)

=628.57cm^2

Answer 2

$\huge\bf{Solution:-}$

Given that :-

$\star$ Diameter = 16cm

radius = diameter /2

radius = 16/2 = 8cm

$\star$ Height = 15cm

THEN ACCORDING TO THE QUESTION:-

$\huge{\boxed{\green{slant\: height, l = \sqrt{{h}^{2} + {r}^{2}} } }}$

slant height l = √15² + 8²

l = √225 + 64

l = √289

l = 17cm

slant height l = 17cm

$\huge{\boxed{\green{ Curved\:surface\:area\:cone = \pi r l } }}$

Curved surface area of cone = 22/7 × 8 × 17

Curved surface area of cone = 2992/7

Curved surface area of cone = 427.42....cm²(approx)