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Let the speed one train be x m/s and the speed of the second train be y m/s. Length of the first train = Speed × Time = 28x Length of second train = Speed × Time = 18y So, {(28x + 18y)/(x + y)} = 24 ⇒ 28x + 18y = 24x + 24y ⇒ 4x = 6y Therefore, x: y = 3:2
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