Question

A bicycle wheel has a diameter of 70 cm.

It makes 20 full turns.

How far has the bicycle travelled?

Give your answer to the nearest metre.

Answer 1

44 meters / metres

Explanation:

We will find the circumference of the bike wheel and then multiply it by 20.

C = 2πr

C = 2π(35)

C ≈ 220 cm

-> 70 cm diameter / 2 = 35 cm radius

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220 cm per rotation * 20 turns = 4,400 cm

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4400 cm / 100 = 44 meters / metres