A man in train notice that he can count 51 telephone posts in 1 minute. If they are known to be 30 meters apart,then at what speed is the train traveling? Choose the most appropriate option.
A) 100km/hr
B) 110km/hr
C) 50km/hr
D) 150km/hr
E) 90km/hr
Number of gaps between 51 telephone posts = 50   Distance traveled in 1 minute = 50*30= 
<gadget id="calculator">50*30</gadget>
<output>1_500</output>
1500m= 1.5km   Speed = 60*1.5=900km/hr   Answer is 90km/hr
<result>E</result>
A man in train notice that he can count 51 telephone posts in 1 minute. If they are known to be 30 meters apart,then at what speed is the train traveling?