A 220 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?
Select the correct option:
A) 230m
B) 240m
C) 250m
D) 260m
E) 280m
speed = (120 + 80)km/h (because direction is opposite hence relative velocity is added)= 500/9 m/s   time= 9sec   let the lenght of second train is x   total distance covered= 220 + x   therefore, D= speed*time   thus 220 + x = 500/9 * 9= 
<gadget id="calculator">500/9 * 9</gadget>
<output>500</output>
500-220= 
<gadget id="calculator">500-220</gadget>
<output>280</output>
280 m   ANSW280mR:280m
<result>E</result>
A 220 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?