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Maths / Surface Area and Volume / Lateral Surface Area of Cone
QUESTION
 

Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.

OPTIONS
A. 

large 155cm^2

B. 

large 265cm^2

C. 

large 165cm^2

D. 

large 170cm^2

Right Option : C
EXPLANATION
Explain TypeExplanation Content
Text

165 ; cm^2

large l=sqrt{r^2+h^2}

Curved surface area of cone = large pi rl

large =frac{22}{7}times frac{10.5}{2}times 10=165cm^2

 

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