Question

A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as well. Which of the following formulas can be used to calculate the volume of the ball?

V equals four-thirds times pi times r cubed
V equals one-third times pi times r squared times h
V = s3
V = πr2h

Answer 1

For finding density, we need mass (given) and volume (not given).

As,

Density = (Mass)/(Volume)

[SI — kg/m³]

Here, ball = sphere

We know,

Volume of sphere = $\boxed{\frac{4}{3} \pi r^3 }$

or,

(i)✓ V equals four-thirds times pi times r cubed

Answer 2

Answer:

V = πr2h

Explanation:

none needed