Aleksandr has a roll of paper that is in the shape of a right circular cylinder. It has a height of 28 cm and a diameter of 15.5 cm. Help Aleksandr solve for the surface area. Use 3.14 for

Answer 1

the value of pi.

First, we need to find the radius of the cylinder. Since the diameter is 15.5 cm, the radius is half of that, which is 15.5/2 = 7.75 cm.

Next, we can calculate the surface area of the cylinder using the formula:
Surface Area = 2πr(r + h)

Substitute the values we have:
Surface Area = 2 * 3.14 * 7.75(7.75 + 28)
Surface Area = 2 * 3.14 * 7.75(35.75)
Surface Area = 2 * 3.14 * 271.625
Surface Area = 1704.011 cm²

Therefore, the surface area of Aleksandr's roll of paper is 1704.011 cm².