A train 90 m long is running with a speed of 54 km per hour. In what time will it pass a telegraph post?	Select the correct option:
A) 11 s	B) 10 s	C) 6 s	D) 12 s	E) None of these
We know from the formula Time = Distance/ Speed   Thus, Time = 90/ 54 x 5/18   or, Time = 6 sec.   ANSWER:6 s
<result>C</result>
A train 90 m long is running with a speed of 54 km per hour. In what time will it pass a telegraph post?