arithmetic - p and q walk around a circular track they start at 9 am from the same point in the opposite directions p and q walk at a speed of 3 rounds per hour and 5 rounds per hour respectively how many times shall they cross each other before 1131 - skillgun

Solution: Relative speed = (3 + 5) = 8 rounds per hour.
So, they cross each other 8 times in an hour and 4 times in half an hour.
Hence, they cross each other 20 times in 2.5(11.31 - 9.00) hours means before 11.31 A.M.