Find the total surface area of a cylinder whose radius is 7 cm and curved surface area is 3520. (use π = 22/7)
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Correct answer: B
Explanation
The Correct answer is Option 2 i.e. 3828 cm2.
The total surface area of cylinder = 2πr(r + h)
r = radius and h = height
Curved surface area (CSA) of cylinder = 2πrh
⇒ 2πrh = 3520
⇒ 2 × 22/7 × 7 × h = 3520
⇒ h = (3520)/(22 × 2) = 80 cm
The total surface area of cylinder = 2πr(r + h)
⇒ 2 × 22/7 × 7(7 + 80) = 2 × 22/7 × 7 × 87 = 3828 cm2