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January 25, 2015

January 25, 2015

Posted by **crystal** on Sunday, May 16, 2010 at 9:15am.

This is what I put for volume:

v=pir^2h

pi(3cm)^2 6 cm=

54pi cm cubed

can you please check this and show work on how to do the surface area?

Thanks.

- math-PLEASE CHECK AND HELP -
**drwls**, Sunday, May 16, 2010 at 10:24amThe volume of a cone is (1/3) pi r^2 h

You forgot the 1/3 factor in that formula.

The area of the side of a cone is

A = pi c^2*(r/c) = pi*r*c

where c is the slant height.

For the total cone area, you must add the bottom, pi r^2.

- math-PLEASE CHECK AND HELP -
**crystal**, Sunday, May 16, 2010 at 5:59pmthe question was about a cylinder not a cone which is a different formula. thanks.

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