- A120 s
- B240 s
- C100 s
- D2400 s
Step-by-Step Solution
They are both at the start only at common multiples of their lap times. LCM(40, 60) = 120 s.
Answer: A) 120 s
Two runners take 40 seconds and 60 seconds to complete one lap of a circular track. Starting together from the same point, after how long are they first together again at the starting point?
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