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3. A 120 m long train running at the speed of 32 kmph crosses another trainrunning in same direction at the speed of 22 kmph in 72 seconds. What is thelength of the other train? |
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Answer» Answer: Relative speed = (120 + 80) km/hr =500/9 m/sec. Let the length of the other train be x metres. Then,(x + 270)/9=500/9 x + 270 = 500 x = 230. |
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