A train 180 m long is running with a speed of 54 km per hour. In what time will it pass a telegraph post? Choose the most appropriate option
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 = 180/ 54 x 5/18   or, Time = 12 sec.   ANSWER:12 s
<result>D</result>
A train 180 m long is running with a speed of 54 km per hour. In what time will it pass a telegraph post?