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Find the Curved Surface Area of a Cone, If Its Slant Height is 60 Cm and the Radius of Its Base Is 21 Cm. - Mathematics

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प्रश्न

Find the curved surface area of a cone, if its slant height is 60 cm and the radius of its base is 21 cm.  

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उत्तर

Given that
Radius of its base is 21cm
Slant height= 60cm  

WKT, Curved surface area of a cone =`pirl` 

∴ Curved surface area=`22/7xx21xx60` 

=`3960cm^2` 

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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 1 | पृष्ठ ७
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