Question : What will be the curved surface area of a cone of radius 5 cm and a slant height of 30 cm? (Use $\pi=3.14$)
Option 1: 234 m2
Option 2: 715 m2
Option 3: 543 m2
Option 4: 471 cm2
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Correct Answer: 471 cm 2
Solution : We know, Curved surface area of a cone = $\pi rl$, where $r$ = radius, $l$ = slant height According to the question, ⇒ Curved Surface Area = 3.14 × 5 × 30 = 471 cm 2 Hence, the correct answer is 471 cm 2 .
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