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A circular plate has a diameter of
10 inches. An ant walking along the
edge makes 2 revolutions in 4 minutes.
Approximately how many inches does
the ant travel in one minute? Round
your answer to the nearest tenth of
an inch.

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kudzordzifrancis

ANSWER

15.7 inches

EXPLANATION

The circular plate has a diameter of 10 inches.

The radius is

[tex]r = \frac{10}{2} = 5in[/tex]

The circumference of the circular plate is

[tex]C = 2\pi \: r[/tex]

We substitute the value of r to get,

[tex]C = 10\pi[/tex]

[tex]C = 31.42[/tex]

If the an makes 2 revolutions in 4 minutes, then in 1 minute it will make

half revolution.

But 1 revolution is 31 .42

Therefore half revolution is 15.7 inches to the nearest tenth.

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