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December 20, 2014

December 20, 2014

Posted by **anonymous** on Thursday, April 22, 2010 at 6:55pm.

a) Calculate the area on top of the slice that has been cut out.

b) Calculate the volume of the cake that remains after the slice has been removed.

c) Calculate the surface area of the cake that remains after the slice has been removed.

i particularly need to know how to do c) This is bcause I have already worked out the answers to a) and b)

- maths -
**PsyDAG**, Friday, April 23, 2010 at 12:44pmIn terms of surface area, does that refer to the remaining frosted area, or does it include the internal area where the slice was removed? (I assume that you will not include the surface area resting on the plate.)

If the former, subtract the area of top of slice from total top area. Use the portion of the remaining circumference times the height for the area of the sides.

If the latter, add 2 times radius times height to the above area.

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