A train 800 metres long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is: Choices
A) 400
B) 450
C) 500
D) 520
E) 550
Speed of train: 78km/hr=78*(5/18)=21.67m/sec   Distance=800m   Time=60sec   d=s*t   800+x=21.67*60= 
<gadget id="calculator">21.67*60</gadget>
<output>1_300.2</output>
1300.2-800=500   ANSWER :500
<result>C</result>
A train 800 metres long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is: