Question

The curved surface area of
right circular cone of radius
6cm is 188. 4cm² find its height.
(use 3.14).​

Answer 1

Answer:

Radius = 6cm

l ( slant height ) = ?

curved surface area = 188.4 sq.cm.

perpendicular height (h) = ?

Curved surface area of cone = Pie x r x l

188.4 = 3.14 x 6 x l

188.4/3.14 x 6 = l

60/6 = l

10 = l

Therefore,

slant height^2 = perpendicular height^2+radius^2

10^2 = h^2 + 6^2

100 = h^2 + 36

100 - 36 = h^2

64 = h^2

8 = h

Therefore,

Perpendicular height (h) = 8cm.

Slant height (l) = 10cm

Hope it helps you.