The radius and the slant height of a cone are in the ratio 7:13 and the curved surface area is 286 cm2 . Then its radius is
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Answer:
r= 7cm
Step-by-step explanation:
r/l = 7/13
l = 13r/7
curved surface area of cone = πrl
286 = 22/7×r×13r/7
286×49/286 = r^2
49 = r^2
7cm = r
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