A train having a length of 270 meter is running at the speed of 120 kmph . It crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?
Choose the correct choice from the following choices:
A) 320 m B) 190 m C) 210 m D) 230 m E) 240m
Explanation:   Relative speed = 120+80= 
<gadget id="calculator">120+80</gadget>
<output>200</output>
200 kmph= 200×10/36 m/s = 500/9 m/s   time = 9s   Total distance covered = 270 + x where x is the length of other train   (270+x)/9 = 500/9   =&gt; 270+x = 500   =&gt; x = 500-270= 
<gadget id="calculator">500-270</gadget>
<output>230</output>
230 meter   Answer: Option 230 m
<result>D</result>
A train having a length of 270 meter is running at the speed of 120 kmph . It crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?