Question

the radius and slant height of a cone are in the ratio 4 ratio 7 if its curved surface area in 792 CM square find its radius

Answer 1

Let radius be 4k and slant height be 7k

We are given, CSA of cone = π*r*l
                            So, 792 = 22/7*4k*7k
                                   792 = 22*4k²
                            so, 4k² = 36
                                 = k² = 9
                       Hence k = 3

So, Radius = 4k = 4*3 = 12 cm

Answer 2

Answer⤵

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