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The circular opening of a tunnel has a circumference of 36 meters. What is the diameter of the tunnel?

The circular opening of a tunnel has a circumference of 36 meters. What is the diameter of the tunnel?
asked 80.5k views
5 votes
The circular opening of a tunnel has a circumference of 36 meters. What is the diameter of the tunnel?

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User Marek Jalovec
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7.5k points

1 Answer

4 votes
C=2(3.14159...)R
You’re given the circumference, so all you need to do is plug that in and simplify.
36=2(3.14159...)R
36=6.28R
36/6.28=R
R is about 5.73
answered
User Sasha Grey
by
8.7k points
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