A 270 m long train running at the speed of 120 km/hr crosses another train running in opposite direction at the speed of 80 km/hr in 9 sec. What is the length of the other train? Choose the correct choice from the following answers: A) 230 B) 997 C) 266 D) 289 E) 179
Relative speed = 120 + 80= 
<gadget id="calculator">120 + 80</gadget>
<output>200</output>
200 km/hr.= 200 * 5/18 = 500/9 m/sec.   Let the length of the other train be x m.   Then, (x + 270)/9 = 500/9 =&gt; x = 230.   230nswer: 230
<result>A</result>
A 270 m long train running at the speed of 120 km/hr crosses another train running in opposite direction at the speed of 80 km/hr in 9 sec. What is the length of the other train?