A train travels 250 km in 2 hours and 350 km in 4 hours.find the average speed of train.  Select.
A) 80 kmph  B) 60 kmph  C) 70 kmph  D) 100 kmph  E) None of these
As we know that Speed = Distance / Time   for average speed = Total Distance / Total Time Taken   Thus, Total Distance = 250 + 350= 
<gadget id="calculator">250 + 350</gadget>
<output>600</output>
600 km   Thus, Total Speed= 6 hrs   or,Average Speed = 600/6   or, 100kmph.   ANSWER:100 kmph
<result>D</result>
A train travels 250 km in 2 hours and 350 km in 4 hours.find the average speed of train.