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
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
Let the required number of revolutions made by larger wheel be x, Then more cogs, less revolutions
∴ 14 : 6 : : 21 : x
`⇒ "x" =(21xx6)/14=9`
Concept: Number System (Entrance Exam)
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