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Question

Three athletes A, B, C are participating in a racing event. They start running together. A takes 30 seconds to complete one round on the track, B takes 40 seconds and C takes 45 seconds. What is the minimum number of seconds after which will they all be at the same place again?


A

14220 kg

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B

12240 kg

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C

12440 kg

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D

14422 kg

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Solution

The correct option is C

12440 kg


The athletes will be at the same place after the time which is the LCM of the times required to complete one round for each athlete.
Therefore, time required = LCM (30,40,45) = 360 seconds.


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