Suppose that a satellite is in orbit 250 miles above the equator of the earth.About how much further

题目

Suppose that a satellite is in orbit 250 miles above the equator of the earth.About how much further does the satellite travel in one orbit than would a person traveling once around the equator on the surface of the earth?
Round your answer to the nearest integer.
The satellite travels about （ ） miles further than a person traveling once around the equator.

答案

Assume that the radius of the equator is r.Then by the formula of the circle's circumference,we have the expression2pi ( r +250) as the circumference of the satellite,and 2 Pi r as the circumference o...