What is the speed of a train if it overtakes two persons who are walking in the

Question

What is the speed of a train if it overtakes two persons who are walking in the same direction at the rate of a m/s and (a + 1) m/s and passes them completely in b seconds and (b + 1) seconds respectively?

Options:

A . (a + b) m/s

B . (a + b + 1) m/s

C . (2a + 1) m/s

D . $$\frac{{2{\text{a}} + 1}}{2}$$ m/s

Answer: Option B

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