1. $$\frac{{3{\text{m}}{{\text{r}}^2}}}{5}$$
  2. $$\frac{{3{\text{m}}{{\text{r}}^2}}}{{10}}$$
  3. $$\frac{{2{\text{m}}{{\text{r}}^2}}}{5}$$
  4. $$\frac{{4{\text{m}}{{\text{r}}^2}}}{5}$$
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Answer: Option 2

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