Time for a Train to Cross an Electric Post After Overtaking Two Walkers - future first OA Question | OAHelper

Company: future first

Difficulty: medium

Problem Statement

Time for a Train to Cross an Electric Post After Overtaking Two Walkers Two persons are walking beside a railway track at respective speeds of 2 km/h and 4 km/h in the same direction. A train comes from behind them and crosses the first person in 90 seconds and the second person in 120 seconds, respectively. The time, in seconds, taken by the train to cross an electric post is:

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