Homework Help: maths

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

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)

maths - PsyDAG, Friday, April 23, 2010 at 12:44pm
In 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.

Answer this Question

Related Questions

maths - a cylindrical cake with radius 12cm and height 10cm has a slice cut out...
maths - a cylindrical cake with radius 12cm and height 10cm has a slice cut out...
maths - a cylindrical cake with radius 12cm and height 10cm has a slice cut out...
maths - a cylindrical cake with radius 12cm and height 10cm has a slice cut out...
maths - a cylindrical cake with radius 12cm and height 10cm has a slice cut out...
maths - a cylindrical cake with radius 12cm and height 10cm has a slice cut out...
maths - a cylindrical cake with radius 12cm and height 10cm has a slice cut out...
maths - Kat has a recipe for a 10cm square based iced cake of height 5 cm. He ...
maths --plse help me.. - A toy is in the shape of a right circular cylinder with...
Calculus I - *Optimization problem* [I don't know how to get to the answer] ...

For Further Reading

First Name:
School Subject:
Answer: