Okay, here we have this:
4.C:
Considering the provided cylinder, we are going to calculate the requested total area, so we obtain the following:
Then we will substitute in the following formula for the total area of a cylinder:
A= 2πr(h+r)
Replacing:
A= 2πr(h+r)
A= 2(22/7)(10)(10+10)
A= 2(22/7)(10)(20)
A= 2(22/7)(200)
A= (22/7)(400)
A=8800/7
A≈1257.14 cm^2
Finally we obtain that the total surface area of the cylinder is 8800/7cm^2 that is approximately 1257.14 cm^2.