Warning: implode(): Invalid arguments passed in /www/wwwroot/jobquiz.info/mdiscuss.php on line 336 What is the speed of the train? I. The train crosses a signal pole in 18 seconds. II. The train crosses a platform of equal length in 36 seconds. III. Length of the train is 330 metres. ?->(Show Answer!)
1. What is the speed of the train? I. The train crosses a signal pole in 18 seconds. II. The train crosses a platform of equal length in 36 seconds. III. Length of the train is 330 metres.
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By: guest on 01 Jun 2017 05.48 pm
Let the speed of the train be x metres/sec. Time taken to cross a signal pole = Length of the train Speed of the train Time taken to cross a platform = (Length of the train + Length of the Platform) Speed of the train Length of train = 330 m. I and III give, 18 = 330 x = 330 m/sec = 55 m/sec. x 18 3 II and III give, 36 = 2 x 330 x = 660 m/sec = 55 m/sec. x 36 3 Correct answer is (D).