A train moves fast a telegraph post and a bridge 264 m long in 8 sec and 40 sec respectively. What is the speed of the train? Select:
A) 89  B) 29.7  C) 56  D) 79.2  E) 67
Let the length of the train be x m and its speed be y m/sec.   Then, x/y = 8 =&gt; x = 8y   (x + 264)/40 = y   y = 8.25 Speed = 8.25 m/sec = 8.25 * 18/5= 
<gadget id="calculator">8.25 * 18/5</gadget>
<output>29.7</output>
29.7 km/hr.   Answer: Option 29.7
<result>B</result>
A train moves fast a telegraph post and a bridge 264 m long in 8 sec and 40 sec respectively. What is the speed of the train?