slant hieght of a solid right circular cone is 7 cm and total surface area is 147.84 cm2 find the radius of the base of the cone
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In the attachment I have answered this problem.
Concept:
Total surface area of cone
= pie ×r×(l+r)
A quadratic equation in r is formed from total surface formula by putting l l =7 cm .
Then quadratic formula is used to find r.
See the attachment for detailed solution
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