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A jokers cap is in the form of a right circular coneof base radius 7 cm and height24 cm. Find the area of the sheet required to make 10such caps. |
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Answer» Area of the cardboard required = Curved surface area of the cap (or cone)=`pi r l` Now, `l=sqrt(r^(2)+h^(2))=sqrt(7^(2)+24^(2))=sqrt(49+576)=sqrt(625)=25 cm` `implies" Curved surface area"=(22)/(7) xx 7 xx 25=550 cm^(2)` ` :. " Area of the cardboard required "=550 cm^(2)`. |
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