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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?

 Aug 29, 2019
edited by Guest  Aug 29, 2019
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The lateral area  is given by :   pi * R * L      where R is the cone's radius  and L is the slant height

 

The slant height ,L,  is given by   √[ cone height^2 +  radius^2]  =  √[4^3 + 3^2]= √25  = 5

 

So....the lateral area  = 

 

pi * 3 * 5   =

 

15 pi units^2

 

cool cool cool

 Aug 29, 2019

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