Two trains are running at 58 km/hr and 42 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 27 seconds. What is the total length of the two trains ?

120 m

130 m

150 m

180 m

relative speed = (58 -42) km/hr = 16 km/hr. = 16 * 5/18 m/sec = 40/9 m/sec. total length of the two trains = (40/9 * 27) = 120 m.

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