Question

a joker's cap is in the form of a right circular cone if base radius 7 cm and height 24cm. find the area of the sheet required to make 10 such caps?

Answer 1

Radius=7cm
Height=24 cm
Slant height[l]=√r²+h²=√7²+24²=√49+576=√625=25cm
C.S.A of cap=pi*r*l=[22/7*7*25] cm sq.
sheet req to make 10 such caps =22/7*7*25*10=5500cm²