Question

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

Answer 1

Answer:

4375 Complete revolutions

Step-by-step explanation:

Diameter = 80 cm there fore the radius will be 40 cm.

Now in 1 hours the car goes 66 km so

in 10 min = 1/6 hours the car goes   $66*\frac{1}{6} = 11 km$

11 km = 11*1000*100 cm is the distance that the car covers in 10 minutes\

Now per revolution the car goes 2*π*40 cm = $2*\frac{22}{7} *40$ cm

The Number of revolutions in 10 min

$\frac{11*1000*100}{2*\frac{22}{7}*40}$

$= \frac{11*1000*100*7}{2*22*40}$

= 4375 revolutions