Question

if the radius of asphere is doubled how many time of it becomes( 1) surface area (2) its volume

Answer 1

Let the radius of sphere be R.

Then,

It's surface area = 4πR²

If it's radius become double then radius become 2R and surface area become 4π2R²

And,


the volume of sphere = 4/3πR³

If the radius of the sphere become double then it's radius become 2R.

Then,

the volume of sphere = 4/3π2R³.