A right circular cone has a radius of 6 inches and an altitude of 8 inches. Use L = (pie)(r)(l ) in order to find the exact total area of the cone.

Question

shubhamsrg · Answer

Assuming you are being asked total surface area, just add lateral surface area to the area of the circle to get the total surface area.
value of L is already given to you. Use area of circle = pi r^2 , make substitutions and simplofy.

anonymous · Answer

am i using the area of circle for l then solving

ranga · Answer

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Find l first.
Then plug r and l into the formula L = pi * r * l to find the lateral surface area of the cone.

Since they are asking for TOTAL surface area you need to add the bottom circular area of the cone to the above to get the total surface area.

anonymous · Answer

would the answer be 60 pie

ranga · Answer

60 pi is the lateral (meaning "side") surface area.
Here they are asking for TOTAL surface area.  The cone has a bottom portion that is circular in shape and that is also counted in the surface area.

anonymous · Answer

l=10 and area of circle is 36pie

ranga · Answer

correct.  Total surface area = 60pi + 36pi = 96pi.

anonymous · Answer

got it i wasnt sure how they both went together

ranga · Answer

alright.