A train moves fast a telegraph post and a bridge 264 m long in 8 sec and 20 sec respectively. What is the speed of the train?	Choose the correct choice
A) 79.5 B) 79.0 C) 79.3 D) 79.2 E) 79.1
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)/20 = y   y = 22   Speed = 22 m/sec = 22 * 18/5= 
<gadget id="calculator">22 * 18/5</gadget>
<output>396/5 = around 79.2</output>
79.2 km/hr.Answer:79.2
<result>D</result>
A train moves fast a telegraph post and a bridge 264 m long in 8 sec and 20 sec respectively. What is the speed of the train?