The length of a train and that of a platform are equal. If with a speed of 54 k/hr, the train crosses the platform in one minute, then the length of the train (in meters) is? Choose the correct choice:
A) 757
B) 450
C) 718
D) 750
E) 738
Speed = [54 * 5/18] m/sec = 15 m/sec; Time = 1 min. = 60 sec.   Let the length of the train and that of the platform be x meters.   Then, 2x/60 = 15 è x = 15 * 60 / 2= 
<gadget id="calculator">15 * 60 / 2</gadget>
<output>450</output>
450   Answer:450
<result>B</result>
The length of a train and that of a platform are equal. If with a speed of 54 k/hr, the train crosses the platform in one minute, then the length of the train (in meters) is?