Question

Curved surface area of a cone is 308cm2 its slant hight is14cm find total surface area of the cone

Answer 1

ANSWER=462 SQUARE UNIT

Explanation:

curved surface area of cone is = πrl

slant height= l

308 = πr×14

308÷14=πr

22=πr

22= 22÷7×r. ( π=22÷7)

22×7÷22= r

[ 7= r ]

total surface area of cone is = πr(r+l)

=22/7×7(7+14).

=22×(21)

total surface areas of cone is =462 square unit