Advertisement Remove all ads

A Wheel that Has 6 Cogs is Meshed with a Larger Wheel of 14 Cogs. When the Smaller Wheel Has Made 21 Revolutions, Then the Number of Revolutions Made by the Larger Wheel is - Mathematics

Advertisement Remove all ads
Advertisement Remove all ads
MCQ

A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions made by the larger wheel is

Options

  • 7

  • 9

  • 14

  • 42

Advertisement Remove all ads

Solution

9

Explanation:

Let the required number of revolutions made by larger wheel be x, Then more cogs, less revolutions 
(indirect proportion)

∴ 14 : 6 : : 21 : x

`⇒ "x" =(21xx6)/14=9`

Concept: Number System (Entrance Exam)
  Is there an error in this question or solution?
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×