Question

a cone has a radius of 24 cm and a volume of 1920 cm cubed what is the volume of a similar cone with a radius of 18 cm

Answer 1

if it is similar the volume ratio is equal to the cube of the length ratio.
(18/24)^3 = V/1920
1920 * (3/4)^3 = V

Answer 2

its 810cm^3
just took the test