Question

find the curved surface area of right circular cone of height 8 meters and base diameter 12 cm

Answer 1

height of the cone =h= 8 cm [i think it is not meters]

diameter =d =12 cm
radius =r = d/2 = 12/2= 6cm

slant height =l = ?

l^2 = h^2 + r^2
= 8^2+6^2
= 64+36
=100
therefore

l= 10cm
curved surface area of a cone = pi*r*l

= 22/7 * 6*10
= 1320/7
=188.57 cm^2