Quote:
Originally Posted by smhbbag  I'm not quite sure how subtracting 3/8 from 5/8 is relevant at all.
If the trestle is 1000 yards long, and the train is 1/4 mile away from the start of the trestle (our guy has bad hearing), then he will have to run 375 yards in 15 seconds, or 625 yards in just under a minute. Running 15 mph just ain't gonna cut it.
Or, the train could be 2 miles away (blowing his whistle real loud), and the trestle could be only 30 yards long. In that case, he can leisurely stroll to either side.
Just these two examples show the length of the trestle and the distance of the train are not optional information, imho. |
It's just a math problem, and given the conditions in the problem, there is a unique solution.
You have to work with the given conditions, or those posed by the problem. The train is 3/8 of a bridge from the bridge.
The conditions that you describe lead to a different problem and a different solution.