P and Q walk along a circular track. They start at 5:00 a.m. from the same point in opposite directions. P walks at an average speed of 5 rounds per hour and Q walks at an average speed of 3 rounds per hour.
How many times will they cross each other between 5:20 a.m. and 7:00 a.m.?
A
12
B
13
C
14
D
15
Correct Answer: Option B
Explanation
1. **Analyze the Speed:** P (5 rounds/hr) and Q (3 rounds/hr) move in opposite directions. As per prev