A man in train notice that he can count 51 telephone posts in 1 minute. If they are known to be 5 meters apart,then at what speed is the train traveling?	Choose the correct choice from the following answers.
A) 100km/hr B) 110km/hr C) 50km/hr D) 150km/hr E) 200km/hr
Number of gaps between 51 telephone posts = 50   150km/hristance traveled in 1 minute = 50*50= 
<gadget id="calculator">50*50</gadget>
<output>2_500</output>
2500m= 2.5km   Speed = 60*2.5= 
<gadget id="calculator">60*2.5</gadget>
<output>150</output>
150km/hr   Answer is 150km/hr
<result>D</result>
A man in train notice that he can count 51 telephone posts in 1 minute. If they are known to be 5 meters apart,then at what speed is the train traveling?