Given below are two quantities named A and 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: How much time does it take for a boy walking at a speed of 6 km/hr to cross a train moving in the opposite direction of length 560 m and speed of 66 km/hr?

Quantity B: How much time does it take for a moving train to cross a girl running at a speed of 9 km/hr in the same direction if the length of the train is 450 m and speed is 63 km/hr?