A train passes two bridge lengths 210m and 122m in 25sec and 17sec res – InterviewSolution

1.	A train passes two bridge lengths 210m and 122m in 25sec and 17sec respectively. let's find the length and speed of the train
Answer» -step EXPLANATION:We ASSUME the train's length is X the train covers a total distance of 210+x and 122+x(210+x)/25=(122+x)/17 = speed of the train-> (210+x)17=(122+x)25-> 21017+17x=12225+25x-> (21017) - (12225) = 8X-> x= 65So the length of the train is 65mThe speed of the train = (210+65)/25 or (122+65)/17 =11m/sec

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