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The Radius of a Cone is 7 Cm and Area of Curved Surface is 176 `Cm^2`. Find the Slant Height. - Mathematics

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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.  

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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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अध्याय 20: Surface Areas and Volume of A Right Circular Cone - Exercise 20.1 [पृष्ठ ७]

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आरडी शर्मा Mathematics [English] Class 9
अध्याय 20 Surface Areas and Volume of A Right Circular Cone
Exercise 20.1 | Q 3 | पृष्ठ ७
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