Question

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 π
𝜋
.(1 point)
Responses

1,362.76 cm2
1
,
362.76

cm
2

1,362.76 cm squared

1,508.77 cm2
1
,
508.77

cm
2

1,508.77 cm squared

1,739.95 cm2
1
,
739.95

cm
2

1,739.95 cm squared

4,234.29 cm2

Answer 1

Surface area of a cylinder = 2πr^2 + 2πrh.

Given diameter = 15.5 cm → r = 7.75 cm, h = 28 cm, π = 3.14.

2πr^2 = 2(3.14)(7.75^2) = 2(3.14)(60.0625) = 377.1925
2πrh = 2(3.14)(7.75)(28) = 1362.76

Total = 377.1925 + 1362.76 = 1739.9525 ≈ 1739.95 cm^2

Answer: 1,739.95 cm^2.