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If the distance between A and B is 500 km, how long is the circumference of the earth?

+1 vote
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The height of the sun from point A is larger than that from point B by 4.92 (degree). If the distance between A and B is 500 km, how long is the circumference of the earth? (Assume that earth is perfect sphere.)

Earth Surface

posted Jun 25, 2015 by anonymous

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1 Solution

+2 votes

tan 4.92 = 500 / Center - B
Center - B = 5808 km = radius circle
Circumference = 2 * pi * r = 36495 km

solution Jun 26, 2015 by Jcm



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