Question

The volume of 2 spheres have a ratio of 27:125. what is the ratio of their radii

Answer 1

the volume is scale factor³
Take the square root of the volume ratio


`\sqrt{ (27)/(125) }` which is

`( √(27) )/( √(125) )`


`(3)/(5)`

The ratio of their radii is 3 : 5

Answer 2

Using formula v of hemisphere= 2/3x22/7xr3
v of hemi a= r3= 12.8
= r =2.3
v of hemi b= r3 = 59.6
=r = 3.9
So the ratio is 2.3:3.9