Circumference of a sphere is defined as the circumference of the great circle around the sphereIf Earth is a perfect sphere of 4,000 miles radius what is it's circumference in miles?
Have i worked it out correct = 25132.74 milesSince Earth is not a perfect sphere of 4000 miles radius, I could logically say anything I want and my statement would be "true"; but that wouldn't be what you're asking. You mean, "If Earth were a perfect sphere of 4,000 miles radius what would be its circumference in miles?"
Do you know the formula for the circumference of a circle? It's [MATH]C = 2\pi r[/MATH].
Replace [MATH]r[/MATH] with 4000, and do the calculation.
I don't know as you never said what the circumference equals. Please give complete answers.Have i worked it out correct = 25132.74 miles
Yes, 25132.74 is the correct answer to 2 decimal places for the calculation 2*pi*4000 (in miles)Have i worked it out correct = 25132.74 miles