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- A and B start from the same point and travel in the same direction around a circular track 3 km in circumference, If their speed is 200 and 150 metres a minute, when will they first together again at the starting point?
Question 1:
A and B start from the same point and travel in the same direction around a circular track 3 km in circumference, If their speed is 200 and 150 metres a minute,when will they first together again at the starting point?
A. 40 min
B. 0 min
C. 55 min
D. 1 hour
Feedback Time taken by A in one round = 3000/200 = 15 min
Time taken by B in one round = 3000/150 = 20 min
L.C.m of 15 min and 20 min = 60 min = 1 hr.
Hence, they will meet first together at the starting point after 1 hour.
Time taken by B in one round = 3000/150 = 20 min
L.C.m of 15 min and 20 min = 60 min = 1 hr.
Hence, they will meet first together at the starting point after 1 hour.
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