A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?	Select the correct option:  A) 69.5 km/hr  B) 70 km/hr  C) 79 km/hr  D) 79.2 km/hr  E) None of these
Explanation:   Let the length of the train be L m.   L/8 = (264+L)/20   20L = 8L + 2112   L = 176 m.   Speed of train = 176/8= 
<gadget id="calculator">176/8</gadget>
<output>22</output>
22 m/s= 22 X 18/5 = 79.2 Km/hr   Answer 79.2 km/hr
<result>D</result>
A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?