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प्रश्न
The radius of a cone is 7 cm and area of curved surface is 176 `cm^2`. Find the slant height.
उत्तर
Given
Radius of a cone (r)=7cm.
Let 'l ' be the slant height of a cone
∴ Curved surface area = `pirl`
⇒ `176=pixx7xxl`
⇒` l= 176/(7pi)=(176xx7)/(7xx22)=8cm`
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