Can someone help?

Question

Find the surface area of a cylinder if:
h = 6 m
r = 4 m

Find the surface area of a cone if:
h = 12 m
r = 2 m
s = 9 m

Find the surface area of a rectangular prism if:
l = 13 m
w = 4 m
h = 8 m

What is the area of the polygon shown in the following illustration? Length is 8 m, height is 10 m, and the height of the triangle measures 4 m.

Answer 1

1.Surface are of cylinder = 2*π*r*h
= 2*3.14*4*6
=150.72
Total surface Area of cylinder= 2*π*r*h+π*r*r+π*r*r

2.Surface area of cone= π*r*s
= 3.14*2*9=56.52

Total surface area of cone = π*r*r+surface area of cone

3.Surface area of prism= (13*8+8*4+13*4)*2
= 376


In the last question ,sorry, I couldn't formulate the shape of the polygon.

Answer 2

2pirh+2pir^2 = 2pir( h+r) = 80pi m^2

Don't know what s is. If it's supposed to be the slant height, then the numbers are impossible. The slant height, l, is sqrt
h^2+r^2 = sqrt ( 12^2+2^2)= sqrt(148) = 2sqrt(37).
The circumference of the base is 2pir = 4pi meters
The lateral area is .5 C l = .5*4pi*2sqrt(37)= 4pisqrt(37)
The area of the base is pir^2 = 4pi
So total area is 4pi+4pisqrt(37). Still don't know what s is and it was not needed whatever it is.

A =2lw+2lh+2wh = 2*13*4+2*13*8+2*8*4 = 376 m^2