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+1
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A right cone has an altitude of 4 units and a base diameter of 6 units. What is its lateral area?

A) 37.7 units squared

B) 47.1 units squared

C) 62.8 units squared

D) 75.4 units squared

pwolfey  Nov 7, 2017
 #1
avatar+86889 
+2

Lateral area  =

 

pi *  (radius) * √ [ height ^2  + radius^2 ]  =

 

pi *  ( 4 )  * √ [  4^2 + 3^2 ]  =

 

pi * ( 4 ) * √25  =

 

pi * ( 4 ) * (5 )  =

 

20 pi  units^2  ≈   62.8 units^2

 

 

cool cool cool

CPhill  Nov 7, 2017

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