The diameter of the front wheel of an engine is 2x cm and that of rear wheel is 2y cm To cover the s...........

Quantitative Aptitude (CDS) Time & distance

The diameter of the front wheel of an engine is 2x cm and that of rear wheel is 2y cm. To cover the same distance, what is the number of times the rear wheel revolves when the front wheel revolves n times?

$\frac{n}{xy}$