Wednesday, August 11, 2010

Wednesday Puzzle: Closing the Gap

Two rockets are fired at each other from 3465 miles away.

One rocket travels at 11,000 miles per hour. The other travels at 13,000 miles per hour.

Without doing calculations on paper, can you tell how far apart will they be one minute before they hit each other?

3 comments:

Eye of the Frog said...

If my mind is working this morning, 400 miles.

accordeonaire said...

I'm going to guess 3465 miles.

salvemater said...

The two rockets are traveling toward each other at the rate of 24,000 miles per hour. This is 400 miles per minute. This is all that is needed to answer. The distance they began at is irrelevant, and this assumes the rockets are traveling at a constant rate of speed. So I agree with the first commenter's answer: 400 miles apart at one minute before they collide. That was enjoyable.

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