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Math on the playground (Posted on 2002-08-02) Difficulty: 3 of 5
A circular playground has 2 parellel roads running through it. Their lengths are 112m and 50m. The perpendicular distance between these roads is 92m.

Find the diameter of the playground.

See The Solution Submitted by Dulanjana    
Rating: 3.2857 (7 votes)

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re(2): First Steps | Comment 3 of 7 |
(In reply to re: First Steps by Cheradenine)

When it comes to the final "plug in the numbers" steps, I have all too often found that in my rush to finish I wound up doing something dumb like adding 2 = 2 and getting 5.

So when r and D did not come out as "elegantly" as I'd expected, I assumed I'd done it again. That's why I was planning to tackle it fresh after a good night's sleep.

The fact that you, too got the "inelegant" answers had me double-checking that the squares of 25, 56, and 92 were correctly given as 625, 3136, and 8464.
  Posted by TomM on 2002-08-02 07:48:07

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