Question

How many revolutions must be made by a wheel of diameter 2.8m in order to cover a distance of 484km?

Answer 1

A wheel is a circle.

Given diameter of wheel = 2.8 m

Then radius of the wheel = 2.8/2 = 1.4 m

Now we know that , circumference of circle =
`2\pi r`

Then,

Circumference of wheel = 2 × 22/7 × 1.4

Circumference of wheel = 8.8 m

From the above we can conclude that ;

1 revolution = 8.8 m

x revolution = 484 km = 484000 m

Thus,

`x = (1)/(8.8) * 484000 \\ \\ x = 55000`

Therefore, total of 55,000 revolutions are made by the wheel.