(Solved): The Mars perihelion distance is about 206.650106km and the Mars aphelion distance is about ...

The Mars perihelion distance is about $206.650\times 10^6\mathrm{km}$ and the Mars aphelion distance is about $249.261\times 10^6$. From Kepler's law of periods, calculate the number of days (Earth days) required for Mars to make one revolution around the Sun; then compare your answer with the value given in any textbook (or NASA facts sheet: https://nssdc.gsfc.nasa.gov/planetary/factsheet/marsfact.html). Explain why your answer is different? [assume one earth year is 365.256 days; mean distance of Earth to Sun is $149.598\times 10^6\mathrm{km}$ ]