A train, 800 meter long is running with a speed of 78 km/hr. It crosses a tunnel in 1 minute. What is the length of the tunnel (in meters)?
Options.
A) 500
B) 200
C) 300
D) 250
E) 300
Let length of the tunnel = x meter   distance = (800 + x)meter   Time = 1 =1 minute = 60 seconds   Speed = 78 km/hr=78 Ã—5/18 =65/3 m/s   800+x =60 Ã— 65/3   800+ x=1300   x=500   500NSWER: 500
<result>A</result>
A train, 800 meter long is running with a speed of 78 km/hr. It crosses a tunnel in 1 minute. What is the length of the tunnel (in meters)?