A train that is one mile long starts through a tunnel that is also 1 mile long. the train is traveling 15 miles per hour. how long does it take for the train to get completely through the tunnel?

The train is one mile long, and the tunnel is also one mile long.

Time begin:
When the head of the train begins to enter the tunnel.
Time end:
When the tail of the train leaves the tunnel, or when the head of the train is one mile away from the tunnel.

The train has travelled two miles between "time begin" and "time end".

Can you figure out the time required?

2 minutes

To find out how long it takes for the train to get completely through the tunnel, we need to determine the time it takes for the train to cover the distance of the tunnel.

First, let's convert the speed of the train to miles per minute to make the calculation easier.

Since 1 hour has 60 minutes, the train's speed in miles per minute is calculated as follows:
15 miles/hour = 15 miles / 60 minutes = 0.25 miles/minute.

Now, let's calculate how long it takes for the train to cover the distance of the tunnel.

The train needs to travel a distance equal to the sum of the train length and the tunnel length, which is 1 mile + 1 mile = 2 miles.

Using the train's speed of 0.25 miles per minute, we can find the time it takes for the train to cover 2 miles:

Time = Distance / Speed = 2 miles / 0.25 miles/minute = 8 minutes.

Therefore, it takes the train 8 minutes to get completely through the tunnel.