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Physics

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The escape speed from a planet of mass 2.5×10^24 is 7.0 km/s.What is the planet's radius?

Iam using the formula v=sqr(2GM/r)

v=7
G=6.67*10^-11
M=2.5*10^24
r=?


I get 6.8*10^12

Where did I go wrong?

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