Questions on Geometry: Bodies in space, right solid, cylinder, sphere answered by real tutors!

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Question 113723: A satellite makes a circular orbit around a planet of unknown diameter at an altitude of 1 mile above the planet. Then NASA boosted the satellite to an altitude of 2 miles above the planet. In the second orbit, the satellite travels how many miles farther than it travelled on the first orbit? (C=2 pie r)
>>>>>>>>>PLEASE I NEED YOUR HELP, AND THANKS IN ADVANCE: A satellite makes a circular orbit around a planet of unknown diameter at an altitude of 1 mile above the planet. Then NASA boosted the satellite to an altitude of 2 miles above the planet. In the second orbit, the satellite travels how many miles farther than it travelled on the first orbit? (C=2 pie r)
>>>>>>>>>PLEASE I NEED YOUR HELP, AND THANKS IN ADVANCE
Answer by stanbon(18725) About Me  (Show Source):
You can put this solution on YOUR website!
A satellite makes a circular orbit around a planet of unknown diameter at an altitude of 1 mile above the planet. Then NASA boosted the satellite to an altitude of 2 miles above the planet. In the second orbit, the satellite travels how many miles farther than it travelled on the first orbit?(C=2 pie r)
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Circumference of 1st orbit:
C = 2(pi)(1/2mi) = pi miles
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Circumference of 2nd orbit:
C = 2(pi)*1mi = 2pi miles
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It travels pi miles further in the 2nd orbit than in the 1st.
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Cheers,
Stan H.