Find the ratio of the curved surface area to the total surface area of a cylinder with a base diameter of 14 cm and height 10 cm.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. .
Curved surface area = 2πrh = 2 × π × 7 × 10 = 140π cm2
Total surface area = 2πr(h + r) = 2 × π × 7 × (10 + 7) = 238π cm2
Ratio = 140π/238π = 10/17