Solve for R_T, a, k, m, b
R_{T}=\frac{3}{\pi }\approx 0.954929659\text{, }a=0\text{, }k\in \mathrm{R}\text{, }m=0\text{, }b=0
R_{T}=\frac{3}{\pi }\approx 0.954929659\text{, }a=89180km\text{, }k=\frac{b}{89180m}\text{, }m\neq 0\text{, }b\in \mathrm{R}
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