Given below are two quantities named A & B. Based on the given information, you have to determine the relation between the two quantities. You should use the given data and your knowledge of Mathematics to choose between the possible answers.

Quantity A: A person covers a certain distance of 12 km/hr and reaches 5 minutes late. If he covers the same distance at 10 km/hr then he becomes 15 minutes late. Find the distance.

Quantity B: A person travelling by his bike covers a certain distance. Had he travelled 6 km/h faster, he would have taken 4 minutes less time but if he travels 6 km/hr slower then he takes 6 minutes more time. Find the distance.