Question

the diameter of the wheel of car is 70 cm. how many revolutions will it make to travel 1.65 km?

Answer 1

Let the number of revolutions be x.
x*Circumference of wheel= Area covered
x*2Πr=1.65km
x*2*22/7*35=165000cm
x*2*22*5=165000
x*220=165000
x=750
The wheel of the car will take 750 revolutions to cover an area of 1.65 km.

Answer 2

Given:

the diameter of the wheel of a car is 70 cm.

To Find:

how many revolutions will it make to travel 1.65 km?

Solution:

It is given that the diameter of a wheel of the car is 70cm and we need to find the revolutions it will make to travel 1.65km,

First, we will need to calculate the distance it will travel in a revolution which will be equal to the circumference of the wheel,

Radius = 70/2

           =35cm

So now,

$C=2\pi r\\=2*\frac{22}{7}*35\\ =220cm$

So the distance it will travel in one revolution is 220cm now the number of revolutions it will do to travel 1.65 km will be,

$Revolution=\frac{1.65km}{220cm} \\\\=\frac{165000}{220}\\ =750$

Hence, it will make 750 revolutions.