A train moves fast a telegraph post and a bridge 264 m long in 2 sec and 20 sec respectively. What is the speed of the train?	Select the correct option:
A) 89 B) 23 C) 52.8 D) 79.2 E) 67
Let the length of the train be x m and its speed be y m/sec.   Then, x/y = 2=&gt; x = 2y   (x + 264)/20 = y   y = 14.67   Speed = 14.67 m/sec = 14.67 * 18/5 = 52.8 km/hr.   Answer: Option 52.8
<result>C</result>
A train moves fast a telegraph post and a bridge 264 m long in 2 sec and 20 sec respectively. What is the speed of the train?