Okay this really tough math problem is getting to me!! My friend gave me the word problem saying it's quit simple. But I can't seem to find it that way!! If any one thinks they might be able to figure it out here it is:
Two trains, each three miles long, enter seven one mile long tunnels that are five miles apart from one another on the same track. The trains enter the tunnels at exactly the same time. The first train is going 7 miles/hour, and the second train is going 16 miles/hour. What is the sum of the lengths of the two trains that will protrude from the tunnels at the exact moment that they collide, assuming that neither train changes its speed prior to collision? The trains are on the same track headed in opposite directions (i.e. directly toward one another).
2007-02-23 14:02:01 · 1 answers · asked by Molly P 2 in Science & Mathematics ➔ Mathematics
5 miles.
It is somewhat obvious if you leave out the info you don't need. It doesn't matter how fast the trains are going.
The sum of the length of the two trains is 6 miles. The tunnels are 1 mile long and 5 miles apart. Anywhere in the middle of the track, 6 miles of the track will have 1 mile of tunnel and 5 miles of no tunnel.
2007-02-23 14:12:10 · answer #1 · answered by q_midori 4 · 1⤊ 0⤋