A box of biscuits
A box of biscuits contains 36 biscuits. 20 biscuits have foil wrappers. 15 are chocolate biscuits with foil wrappers. If 9 are not chocolate and do not have a foil wrapper, then how many chocolate biscuits are there?
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To find the volume of a cone you need to know that it is a third of a cylinder and a cylinder's volume is πr^2 * h (pi * r squared * h) where r is its radius and h is its height.
ReplyDeleteObviously, if a cone's volume is 1/3 of a cylinder's, then you just do 1/3 of the cylinders volume.
Therefore, the volume of a cone is '1/3 * pi * r squared * height'.