Thread: Problem 44
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Old January 22nd, 2008, 01:20 AM
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Quote:
Originally Posted by ThePerfectHacker View Post
2)Let two trains be located 100 miles from eachother. The trains travel to eachother at 30 miles per hour. At this moment a bird flys of one train and travels to the other at the speed of 60 miles per hour, the moment it reaches the train it turns around and goes back. It does it back and forth until the trains crash and annihilate the bird. Find the total distance the bird traveled.
Dist. = speed x time

For one train to complete the journey:

100 = \frac{30}{60 \ mins} \times t

t = 200 mins

But now we have 2 trains, going at the same speed, so they will meet at 50 miles. So for the trains to meet each other will take 100 mins.

-----

Now for the bird.

The bird has 100 minutes to go as far as he can before his imminent and brutal death... (Oh the calamity)

d = \frac{60}{60 \ mins} \times 100 \ mins

d = 100 \ miles



EDIT: This looks like such a small distance. Something doesn't seem right.

EDIT2: Messed up with the time, let me correct it.

EDIT3: There we go, 100 miles
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