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If mass of Mars is MMars ≈ 0.11 MEarth, what is the ration of its radius...

If mass of Mars is MMars ≈ 0.11 MEarth, what is the ration of its radius to radius of Earth,  RMars/REarth = ?.  Gravitational acceleration at the Earth and the Mars surfaces are respectively 9.8 m/s^2 and 3.8 m/s^2 approximately.

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Granitational acceleration is given by .GM g R² e= earth ma мо ge q Me X VW 3 M Re Me 2 gog Х Rm Re 3.8 o.ll Me 12 > 9.8 %0.1

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