Question

a 12. A bicycle wheel has a radius of 40 cm. How many times does it revolve during a journey of 10 km? Give your answer to the nearest 100. [For T, use either your calculator value or 3.142.​

Answer 1

The bicycle wheel revolving is a illustration of circumference

The bicycle wheel revolves 4000 times

How to determine the number of times?

The given parameters are:

Radius (r) = 40 cm

Distance =10 km

Start by calculating the circumference of the wheel

$C =2\pi r$

This gives

$C =2 * 3.142 * 40$

$C =251.36$

The number of times to cover a distance of 10 km is then calculated as:

$n =\frac{10km}{251.36cm}$

Evaluate the quotient

$n =3978.35773$

Approximate

$n =4000$

Hence, the bicycle wheel revolves 4000 times

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