Two Trains starting at same time from two stations 320km apart and going in opposite directions cross each other at a distance of 140km from first stations. What is the ratio of their speeds	Pick one.
A) 6:7	B) 4:7	C) 7:9	D) 7:11	E) 7:12
Explanation:   As the two trains are starting at same time   Total distance is 320km   7:9rossed each other 140km from first stations   Therefore first train speed = 140kmph   And other one is 320-140= 
<gadget id="calculator">320-140</gadget>
<output>180</output>
180kmph   Ratio of the two train speeds 140:180= 7:9   Answer: Option 7:9
<result>C</result>
Two Trains starting at same time from two stations 320km apart and going in opposite directions cross each other at a distance of 140km from first stations. What is the ratio of their speeds