The diameter of the base of a right-circular cylinder is 12 cm and the height of the cylinder is 2.45 times the radius of its base. Find the curved surface area of the cylinder.
[Use π=227]
Explanation:
Diameter of the base = 12 cm, hence radius of the base = 12/2 = 6 cm.
Height of the cylinder 2.45 × 6 = 14.7 cm
⇒ Curved surface area = 2πrh
= 2 × 22/7 × 6 × 14.7
= 2 × 22 × 6 × 2.1
= 554.4 cm2.
Hence, option (a).
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