the perimeter of earth is about 25000 miles. if you could dig a tunnel to the center of the earth how long would the tunnel be. round to the nearest 10th
The radius of Earth’s equator, and the length of the tunnel, is about 3978.9 miles.
If the circumference of Earth is 25000 miles, that makes the diameter 25000/ pi= 7957.74 miles. This makes the radius 3978.9 miles.
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