An artificial satellite revolves around the Earth in a circular orbit of radius 42250 km. Find its speed (in km per second) if it takes 24 hours to revolve around the Earth.
\[. . .NSO 2012 \]

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations,
examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Your answer seems reasonable.
Find out if you're right!