Question

The wheels of a car are of diameter 80 cm. How many complete revolution does each wheel make in 10 minutes when car is travelling at a speed of 66km/hrs.​

Answer 1

NCERT questions buddy.. u need to practice to get thorough with our NCERT book most questions come from there..

Answer 2

$\underline{\Huge\mathfrak{Question-}}$

The wheels of a car are of diameter 80 cm. How many complete revolution does each wheel make in 10 minutes when car is travelling at a speed of 66km/hrs.

$\underline{\Huge\mathfrak{Answer-}}$

Here ,

$= > number \: of \: revolutions = \frac{total \: distance}{distance \: covered \: in \: one \: revolution}$

Given ;

Diameter = 80 cm

So ,

$radius = \frac{d}{2} = \frac{80}{2} = 40 \: cm$

Now ,

The distance covered in 1 revolution =The Circumference if the Wheel.

So ,

=> 2 πr

=> 2 × π × 40

=> 80π cm.