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Two persons start from the opposite ends of a 90 km straight track and run to and fro between the two ends. The speed of first person is 30 m/s and the speed of other is 120/6 m/s. They continue their motion for 10 hours. How many times they pass each other?

A

10

B

9

C

12

D

none of the above

Text Solution

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The correct Answer is:
C
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