This answer is incorrect.
To solve this problem you must first realize what each of the letters in the formula are:
Next you simply substitute the numbers you have for the letter in the formula
In this case r = 3 inches and s = 6 inches.
The symbol which looks like this: is known as PI and can be approximated by 3.14
A = 3.14 x 3 x 3 + 3.14 x 3 x 6
A = 3.14 x 9 + 3.14 x 18
A = 28.26 + 56.52
A = 84.78
And this is rounded to 85.
Now let us try another one
What is the surface area of a cylinder whose radius is 5 centimeters and whose height is 10 centimeters? Use the formula:
Technology Related: Thomas.J.Benson@grc.nasa.gov
Responsible NASA Official: Theresa M. Scott (Acting)