Question

The total surface area of a right cylinder which has a base diameter of 10 cm and a height of 7 cm is:

388 square centimeters.
377 square centimeters.
363 square centimeters.
352 square centimeters.
391 square centimeters.

Answer 1

377 square centimeters

Explanation:

Formula: h(2×pi×radius) I know there's a second part but I'm doing this first.

First find the radius, in the problem it says a diameter of 10cm

Divide 10 by 2 to find the radius = 5

I'm going to use 3.14 as Pi

7(2×3.14×5)

7(31.4) = 219.8

Next part, solving for the 2 circles

Formula: 2×pi×radius²

2×3.14×5²

solve 5² first (5×5) = 25

2×3.14×25 is 157

add 219.8 and 157 = 376.8 round to 377

Answer: 377 square centimeters