Convert Earth's Radius of 6.37x10^6 to Circumference in km - Help Jason

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To convert the Earth's radius of 6.37 x 10^6 meters to circumference in kilometers, the formula for circumference (C = 2πr) is essential. The radius in kilometers is 6.37 x 10^3 km. By applying the formula, multiplying the radius by 2 and π yields a circumference of approximately 4.00 x 10^4 km. This calculation confirms the correct conversion from radius to circumference. Understanding the formula is crucial for accurate conversions in geometry.
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I need to convert the Earth's radius of 6.37 x 10^6 into the km, But I need it to be the circumference in km.


I started out with 6.37x 10^6 times (1km/1000m) which gives me 6.37x 10^3. Now I need to convert to the circumference, but not sure how. The answer is 4.00x10^4. I don't see how 6.37x10^3 is going to come close to the answer. Where do I go from here?

Thanks
Jason
 
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What is the formula for a circumference?
 
Last edited:


Borek said:
What is formula for circumference?

I don't know?
 
I find it hard to believe that you were not taught it earlier. But if not - check in your textbook, handbook or in wikipedia, or just google it.
 
Sorry about that. I found the formula. I wasn't thinking right. By using that formula 6.37x10^3 times Pi equals 2.0000. Than i multiplied it by 2 and got 4.00x10^4.
 

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