A train ,125 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 answer:	A) 250 m	B) 245 m	C) 235 m	D) 220 m	E) 240 m
Explanation:   250 mssume the length of the bridge = x meter   Total distance covered = 125+x meter   total time taken = 30s   speed = Total distance covered /total time taken = (125+x)/30 m/s   =&gt; 45 Ã— (10/36) = (125+x)/30   =&gt; 45 Ã— 10 Ã— 30 /36 = 125+x   =&gt; 45 Ã— 10 Ã— 10 / 12 = 125+x   =&gt; 15 Ã— 10 Ã— 10 / 4 = 125+x   =&gt; 15 Ã— 25 = 125+x = 375   =&gt; x = 375-125= 
<gadget id="calculator">375-125</gadget>
<output>250</output>
250   250 mnswer: Option 250 m
<result>A</result>
A train ,125 meters long travels at a speed of 45 km/hr crosses a bridge in 30 seconds. The length of the bridge is