Posted by **Anonymous** on Thursday, April 22, 2010 at 6:11pm.

a cylindrical cake with radius 12cm and height 10cm has a slice cut out. The shape of the top of the slice is a sector of the circle that forms the top of the cake. Exluding the sliced piece, the angle is 320 degrees.

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)

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