# <span lang="EN-US

In one revolution a wheel will cover a distance equal to its circumference, so in order to find the number of revolutions we have to first calculate the circumference of the wheel and then divide it with the total distance covered to find out the total number of revolutions

Given radius of wheel = r = 42 cm

Circumference of wheel = 2πR where R = radius of the wheel

= 2π(42) (putting value of r)

Therefore distance covered in one revolution = 264 cm

Total distance covered = 19.8 km = 1980000 cm

Total number of revolutions = n

Distance covered on 1 revolution ×no. of revolutions = Total distance

264×n = 1980000

n = 7500

Total number of revolutions is 7500.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Right Circular Cylinder45 mins
Sphere and Hemisphere16 mins
Right Circular Cone And Frustum43 mins
Cube and Cuboid41 mins
Area Related to Circles- Important Formula and Concepts59 mins
Heights and Distances-I45 mins
History - Concept and Questions57 mins
Resources and Development Revision28 mins
Corrosion: Types, Pros and Cons41 mins
Revision on Substitution and Elimination Method44 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :

The cost of fenciRS Aggarwal - Mathematics