# The diameter of the driving wheel of a bus in 140 cm.

The diameter of the driving wheel of a bus in 140 cm. How many revolutions per minute must the wheel make in order to keep a speed of 11 kmph?

## Answer/Solution

41.67

### Steps/Work

distance covered in 1 min=(66*1000)/60=183.33cm

circumference of the wheel=(2*(22/7)*.70)=4.4m

no of revolution per min=183.33/4.4=41.67

ANSWER:D

circumference of the wheel=(2*(22/7)*.70)=4.4m

no of revolution per min=183.33/4.4=41.67

ANSWER:D