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- A and B walk around a circular track.
Question 1:
A and B walk around a circular track. They start at 8 a.m. from the same point in the opposite directions. A and B walk at a speed of 2 rounds per hour and 3 rounds per hour respectively.How many times shall they cross each other before 9.30 a.m.?
A. 15
B. 8
C. 7
Feedback Relative speed = (2 + 3) = 5 rounds per hourSo, they cross each other 5 times in an hour and 2 times in half an hourHence,
they cross each other 7 times before 9.30 a.m.
they cross each other 7 times before 9.30 a.m.
D. 10
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