An express electric train takes exact three seconds to enter tunnel which is 1 mile long.
If train is traveling at 120 mile an hour, how long will it take to pass completely through the tunnel ?
Choose the most appropriate option
A) 43 seconds	B) 39 seconds	C) 20 seconds	D) 33 seconds	E) 55 seconds
The train takes 30 seconds to travel 1 mile, plus 3 seconds for the complete train to pass any point, making a total of 33 seconds.
<result>D</result>
An express electric train takes exact three seconds to enter tunnel which is 1 mile long.
If train is traveling at 120 mile an hour, how long will it take to pass completely through the tunnel ?