A train 150 m long is running with a speed of 54 km per hour. In what time will it pass a telegraph post? Choose one:
A) 11 s B) 10 s C) 7 s D) 12 s E) None of these
We know from the formula Time = Distance/ Speed   Thus, Time = 150/ 54 x 5/18   or, Time = 10 sec.   ANSWER:10 s
<result>B</result>
A train 150 m long is running with a speed of 54 km per hour. In what time will it pass a telegraph post?