Question

The curved surface area of a cylinder is 440 cm² and its radius is 5 cm. Find its height.Choose the correct alternative answer for the following question.
(A) 44/π cm
(B) 22/π cm
(C) 44/π cm
(D) 22/π cm

Answer 1

Radius of cylinder = 5 cm

CSA = 440 cm^2

=> 2 pi R h = 440

=> 2 pi × 5 × h = 440

=> 10 pi × h = 440

=> h = 440 / 10 pi

=> h = 44 / pi

Height of cylinder = 44 / pi

Option (A) is correct...

Answer 2

Solution :

Radius of the cylinder (r) = 5 cm

Let the height = h cm

Curved surface area = 440 cm²

2πrh = 440

=> 2 × π × 5 × h = 440

=> h = ( 440 )/( 2 × 5 × π )

=> h = ( 44/π ) cm

Option ( A ) and ( C ) are correct.

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