Find length of the metro?

Statement I : If metro can cross a platform in 40 seconds and a pole in 24 seconds.

Statement II : If the speed of metro is 60 km/hr.

Statement III : If the length of platform is 300metre.

Let Length of Metro = M & length of Platform = P & Speed of Metro = S From I : S = (M+P)/40 = M/24 From II: S = 60: From III: P = 30 So we can find the length of metro by using I & III or even by I & II.

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