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The time take Mars to revolve round the ...

The time take Mars to revolve round the sun is 1.88 years.Find the ratio of average distance between mars and the sun to that between the earth and the sun.

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The correct Answer is:
A, B
According to Keler's laws of planetary motion
`T^2 alpha R^3`
`rarr (T_m^2)/(T_3^2)=(R_(ms)^3)/ (R_(es)^3)`
`rarr(Rms)/(Rm)=1.88/1`
`:. (Rm)/R_(es) =(1.88)^(2/3)=1.52`
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