What will be the length of train 1?

Statement I: If train 1 covers a standing man in 12 sec.

Statement II: if a train 1 covers a platform of 100m in 36 sec.

Statement III: if a train 1 crosses another train 2 in 25 sec.

From I: S1 =L1/12 From II: S1=(L1+100)/36 From III: S1 + S2 =(L1+L2)/25 So we can find L1by Statement I & Statement II.

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