A train covers a distance of 12 km in 10 minutes.If it takes 6 seconds to pass a telegraph post,then the length of the train is  Choose one:  A) 90m  B) 100m  C) 120m  D) 140m  E) None
Speed=(12/10*60)km/hr=(72*5/18)m/sec=20m/sec   Length of the train=(Speed *Distance)   =(20*6)= 
<gadget id="calculator">(20*6)</gadget>
<output>120</output>
120m   Answer:Option 120m
<result>C</result>
A train covers a distance of 12 km in 10 minutes.If it takes 6 seconds to pass a telegraph post,then the length of the train is