Henry Ernest Dudeney/Puzzles and Curious Problems/354 - The Wheels of the Car

by : $354$

 * The Wheels of the Car
 * "You see, sir," said the motor-car salesman, "at present the fore-wheel of the car I am selling you makes four revolutions more than the hind-wheel in going $120$ yards;
 * but if you have the circumference of each wheel reduced by $3$ feet, it would make as many as six revolutions more than the hind-wheel in the same distance."


 * Why the buyer wished that the difference in the number of revolutions between the two wheels should not be increased does not concern us.
 * The puzzle is to discover the circumference of each wheel in the first case.


 * It is quite easy.