Answer:

Step-by-step explanation:
The formula of a surface area of a cylinder:

r - radius
H - height
We have r = 40mm and H = 50mm. Substitute:

5x3/8x3+11x2/12+2
15/24+22/24
15+22/24
37/24
1 13/24
If you want the regular fraction its 37/24, if you want the mixed fraction its 1 13/24
The answer is,

And explanation is in the picture.