Question

9. The radius and slant height of a cone are in the ratio 4 : 7, if its C.S.A is 792 m², find its radius

Answer 1

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Answer 2

Let the radius and Slant Height be 4x and 7x respectively.
CSA = 792

πrl = 792

22/7*4x*7x = 792

28x² = 792*7/22

x² = 792*7/22*1/28

x = √792/22*4

x = √198/22

x = √9

x = 3

Radius = 4x = 4*3 = 12m
Slant Height = 7x = 7*3 = 21m

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