Question

The diameter of the sphere is 20mm what is its volume if your answer is in decimal give it to 1 d.p

Answer 1

volume of sphere = 4186.7 mm³

Explanation:

volume of sphere = 4/3πr³

given:

diameter = 20 mm

radius = diameter/2 = 20/2 = 10 mm

π = 3.14

by substituting the values in the formula:

v = 4/3 * 3.14 * 10³

= 4/3 * 3.14 * 1000

= 4/3 * 3140

= 12560/3 = 4186.7 mm³

thus,

volume of sphere = 4186.7 mm³

Answer 2

4000π/3 mm³ ≈ 4188.8 mm³

Explanation:

You want the volume of a sphere 20 mm in diameter.

Volume

The radius of the sphere is half its diameter, so is 10 mm.

The volume is given by the formula ...

V = 4/3πr³

V = 4/3π(10 mm)³ = 4000π/3 mm³ ≈ 4188.8 mm³

The volume of the sphere is 4000π/3 mm³, about 4188.8 mm³.

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