Question

Calculate the surface area of a cone with radius of 4 in. and slant height of 10 in

Answer 1

actually, you don't need to know h, sorry. I thought you were looking for volume.

Answer 2

to find the SA of the cone, you need to find the area of the base and the area of the other part.

area of base is just the area of a circle, so πr^2 = 4^2π = 16π
area of the other part =πrs, where s = slant height, so 4*10π

Answer 3

16π + 40π = 56π