Find the total surface area of a cylinder whose height is 8.5 mm and the base diameter is 10 mm.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 135π mm2.
Radius = Diameter/2 = 10/2 = 5 mm
T.S.A of cylinder = 2πr(h + r)
⇒ T.S.A = 2 × π × 5(8.5 + 5)
⇒ T.S.A = 2 × π × 5 × 13.5
⇒ T.S.A = 135π mm2