Question

Find total surface area of a cone whose radius is 2r and slant height is l/2

Answer 1

hey dear

here is your answer

Given

Radius = 2r

height = 1/2


Total surface area of cone = ?

solution are as follows

we apply formula of total surface area of cone

TSA = pi r l + pi r^2

TSA = pi r ( l + r) so units

TSA = 22/7 * 2r ( 1/2 + 2r)

TSA = 22/7 *2r ( 1/2 *2r )

simplify this

and it come

TSA = pi * 2r *r


TSA = 2pir^2

it is a answer


hope it helps

thank you