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

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SUMMARY

The discussion centers on converting the Earth's radius of 6.37 x 10^6 meters into its circumference in kilometers. The correct formula for circumference, C = 2πr, was applied after initial confusion. By converting the radius to kilometers (6.37 x 10^3 km) and using π, the circumference was calculated as 4.00 x 10^4 km. This demonstrates the importance of understanding the formula for circumference in practical applications.

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  • Understanding of the formula for circumference (C = 2πr)
  • Basic knowledge of unit conversion (meters to kilometers)
  • Familiarity with mathematical constants (π)
  • Ability to perform scientific notation calculations
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  • Research the mathematical constant π and its applications in geometry
  • Learn more about unit conversions, specifically between metric units
  • Explore advanced applications of circumference in real-world scenarios
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Darkhrse99
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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
 
Last edited:
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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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