A train ,155 meters long travels at a speed of 45 km/hr crosses a bridge in 30 seconds. The length of the bridge is	Choose the correct choice from the following choices:
A) 270 m B) 245 m C) 235 m D) 220 m E) 240 m
Explanation:   Assume the length of the bridge = x meter   Total distance covered = 155+x meter   total time taken = 30s   speed = Total distance covered /total time taken = (155+x)/30 m/s   =&gt; 45 Ã— (10/36) = (155+x)/30   =&gt; 45 Ã— 10 Ã— 30 /36 = 155+x   =&gt; 45 Ã— 10 Ã— 10 / 12 = 155+x   =&gt; 15 Ã— 10 Ã— 10 / 4 = 155+x   =&gt; 15 Ã— 25 = 155+x = 375   =&gt; x = 375-155= 
<gadget id="calculator">375-155</gadget>
<output>220</output>
220   Answer: Option 220 m
<result>D</result>
A train ,155 meters long travels at a speed of 45 km/hr crosses a bridge in 30 seconds. The length of the bridge is