Question

If the curved surface area of a cone is 616 cm² and its slant height is 28 cm, then find the radius of the base.
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Answer 1

Given, CSA = 616 cm²

slant height = l = 28 cm

Now,

CSA = πrl

616 = 22/7 × r × 28

r = 22 × 7/22

r = 7cm

Hope it helps....