A cone-shaped piece of baker’s chocolate has a radius of 3 cm and a height of 9 cm. Samia shaves off some of the chocolate. The remaining piece is still shaped like a cone with a radius of 3 cm, but the height is 6 cm.


How much chocolate did Samia shave off?

Use 3.14 to approximate pi and express your final answer in hundredths.

Verified Answer :

Alrighty, let's find the volume of the cylinder post-Samia and after. 


The equation for the volume of a cone is \(V_{cone}=\frac{1}{3}\pi r^{2}h\)


BEFORE:


\(V_{cone}=\frac{1}{3}\pi 9*9 = 27*3.14 = 75.36\)


AFTER:


\(V_{cone}=\frac{1}{3}\pi 9*6 = 18*3.14= 56.52\)


And now to find out how much was taken off:


\(75.36-56.52=18.84\)