2 trains starting at the same time from 2 stations 200 km apart and going in opposite direction cross each other at a distance of 110 km from one of the stations. What is the ratio of their speeds Choose the correct option.
A) 11:9
B) 13:9
C) 17:9
D) 21:9
E) None of these
Explanation:   We know total distance is 200 Km   If both trains crossed each other at a distance of 110 km then one train covered 110 km and other 90 km [  110+90= 
<gadget id="calculator">  110+90</gadget>
<output>200</output>
200km]   So ratio of their speed= 110:90 = 11:9   Option 11:9
<result>A</result>
2 trains starting at the same time from 2 stations 200 km apart and going in opposite direction cross each other at a distance of 110 km from one of the stations. What is the ratio of their speeds