Question

Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for π and round to the nearest tenth.
439.6 ft2
324.5 ft2
571.5 ft2
285.7 ft2

Answer 1

What is the formula for the lateral area of a cone?

Answer 2

Hey there! I see that you are new to openstudy.
This is a great website on getting help with questions
of any subject. It is a fun way of learning!
I wish you good luck on openstudy and dont forget to
read the http://openstudy.com/code-of-conduct
so you know the rules and regulations :)
Hope you have fun!

Answer 3

@ mertsj it's v=1/3 bh

Answer 4

That is the formula for the volume. Notice your problem asks for lateral area. It's a different formula.

Answer 5

L.a. =1/2 (2pi r)l = pi r l

Answer 6

That's it!!! What is r in this problem?

Answer 7

Radius is 7 ft.

Answer 8

What is l ?

Answer 9

l is the height of the cone

Answer 10

No. It is the slant height.

Answer 11

Oh so 13ft.