SOLUTION: Re: Width of a crater if cits circumference is 12.3 miles: 12.3 (C) = 3.14d 12.3 3.14d ---- = ----- 3.14 3.14d = 3.9 width

Algebra ->  Proportions -> SOLUTION: Re: Width of a crater if cits circumference is 12.3 miles: 12.3 (C) = 3.14d 12.3 3.14d ---- = ----- 3.14 3.14d = 3.9 width      Log On


   



Question 62329: Re: Width of a crater if cits circumference is 12.3 miles:
12.3 (C) = 3.14d
12.3 3.14d
---- = -----
3.14 3.14d
= 3.9 width

Answer by 303795(602) About Me  (Show Source):
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Re: Width of a crater if cits circumference is 12.3 miles:
12.3 (C) = 3.14d
12.3 3.14d
---- = -----
3.14 3.14d
= 3.9 width

This is already solved. I will try to explain what has happened in each step to maybe make it clearer.
The formula for cicumference is
Circumference+=+Pi+%2A+diameter The width of the crater is another way of describing the diamter of a circle. In this problem we need to use the formula to find the diameter.
You know that the circumference of the crater is 12.3 miles. Your formula therefore becomes
12.3+=+Pi+%2A+diameter divide both sides of the equation by Pi
12.3+%2F+Pi+=+Pi+%2A+diameter+%2F+Pi
12.3+%2F+Pi+=+diameter Use the value of Pi which you normally use (3.14 or the Pi button on the calculator etc).
Using posted problem as it is written shows that the answer would be 3.9 miles.