SEARCH HOME
 Math Central Quandaries & Queries
 Question from nurul, a student: Best Bakery shop received an order from your school to bake a 5kg of round cake for teachers day celebration. if a kilogram of cake has a volume of 3800cm^3,and the height of cake is to be 7.0cm, calculate the diameter of the baking tray to be used to fit the 5kg cake ordered by your school?(used pai=3.142)

Hi,

If the volume of a kilogram of cake is $3800 \mbox{cm}^3$ what is the volume of a five kilogram cake? The shape of the cake is a cylinder and the volume, $V$ of a cylinder is given by

$V = \pi r^2 h$

where $r$ is the radius and $h$ is the height. You know the volume and the height so substitute these into the expression above and solve for r.

Penny

Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.