The surface area of a cylinder?

18.85

*You should run the numbers yourself as well. Sometimes different calculators will get marginally different numbers or use a different rounding for that gives a slightly different answer*

Step-by-step explanation:

Surface area of a cylinder:

Where h is the height and r is the radius. Remember that the radius is half the diameter, and the diameter is a straight line that passes through a circle.

I could be wrong, but I think you had the correct equation but used the diameter in stead of the radius to get 50.36.

Radius: 1   Height: 2

Plug numbers into equation:

I hope that helps!

the correct answer is 828.07