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Three persons A, B, C run along a circular path of 8 km. long. They start their race from the same point and at the same time with a speed of 4 km., 6 km., and 8 km. After what time will they meet again?

A) 3 hrs.
B) 1 hr.
C) 4 hrs.
D) \( \Large \frac{2}{3} \) hrs.

Correct Answer:



C) 4 hrs.

Description for Correct answer:
Time taken by A, B, C to cover 8 kms. is 2 hr, \( \Large \frac{4}{3} \)hrs and 1 hour respectively.

LCM of 2, \( \Large \frac{4}{3} \), 1

Use the formula LCM = \( \Large \frac{LCM\ of\ Nrs.}{HCF\ of\ Drs.}=\frac{4}{1}=4 \)

They will meet again after 4 hrs.

Part of solved LCM and HCF questions and answers : >> Elementary Mathematics >> LCM and HCF

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