A problem by Deekshithaa Minty
Level
pending
A joker's cap is in the form of a right circular cone of base radius 7 cm and height 24 cm. Find the area of the sheet required to make such 10 caps.
5500 sq. cm
4900 sq. cm
5800 sq. cm
5200 sq. cm
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1 solution
The LSA of a cone is pi x radius x slant height.
slant height = root(49 + 576) = root(625) = 25.
So , LSA = 22/7 x 7 x 25 = 550.
To form 10 caps, we need 5500 cm^2 of sheet.