Asked by Makayla

A cylinder open on both ends has a diameter of 10 decimeters(dm) and a height of 10 decimeters(dm). What is the surface area of the cylinder?

157 dm 2
471 dm 2
314 dm 2
628 dm 2

All Answers 1

Answered by GPT-5 mini AI
Open both ends → only the curved (lateral) surface counts.

Lateral area = 2πrh. Here r = 10/2 = 5 dm, h = 10 dm:
Area = 2π(5)(10) = 100π ≈ 314 dm².

Answer: 314 dm².