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Circular Motions & Typical Time Speed & Distance 7

Sujoy Das
24/02/2018 0 0

Concept 4: Time when they will meet for the first time at the Starting Point.

Time when they will meet first time at the starting point = LCM(time taken by each individual to take one round) .

Let's assume there are three persons, A, B and C with respective speed of 30, 20 and 10 m/s

Length of track = 1000 m .

Time taken by A = 1000/30
Time taken by B = 1000/20
Time taken by C = 1000/10

LCM(100/3, 50, 100) = LCM(100,50,100)/HCF(3,1,1) = 100/1 = 100s.

Hence they all will meet first time at the starting point after 100s.

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