Question

A tennis ball is of diameter 7cm. what is its
volume in (a) cm³ (b) m³ .​

Answer 1

The diameter of a tennis ball = 7 cm

Radius of the tennis ball = 7/2cm

TO FIND:

Volume of the ball in cubic meters and centimetres.

SOLUTION:

The ball is in the shape of a sphere. So, we should find the volume of sphere.

We know that,

Volume of Sphere = 4/3πr²

==> 4/3 × 22/7 × 7/2 × 7/2 × 7/2

==> 1/3 × 11 × 7 × 7 ×

==> 11 × 49 × 1/3

==> 539/3

==> 179.66 cm³

Convert 179.66cm³ into m³

179.66 * 10^-6 m = 0.00017966m³

Therefore, the volume of ball is 179.66cm³.

Answer 2

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