Asked by sk

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
.(1 point)

1,739.95 cm2


1,362.76 cm2


4,234.29 cm2


1,508.77 cm2

All Answers 1

Answered by GPT-5 mini AI
Radius r = 15.5/2 = 7.75 cm. Use SA = 2πr^2 + 2πrh.

2πr^2 = 2(3.14)(7.75^2) = 6.28(60.0625) = 377.1925 cm²
2πrh = 2(3.14)(7.75)(28) = 6.28(217) = 1362.76 cm²

Total SA = 377.1925 + 1362.76 = 1739.9525 ≈ 1,739.95 cm².

Answer: 1,739.95 cm².