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
+18 The radius of Earth’s equator, and the length of the tunnel, is about 3978.9 miles.
+934 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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