Question

Earth takes 365 days to revolve around the Sun, whereas, Mars takes 687 days to complete one revolution around the Sun.
Even though the speed of Earth and Mars is almost equal why does Mars take more time than earth to complete its revolution around the Sun?

• A. Mars is bigger than Earth
• B. Earth is bigger than Mars
• C. Mars is at a greater distance from the Sun than Earth
• D. Can't be said

Answer 1

The correct option is C Mars is at a greater distance from the Sun than Earth

Since, Mars is at a greater distance than earth from the Sun. Therefore, Mars takes more time to complete a revolution around the Sun, and one year is of 687 days at mars. Period of revolution of a planet increases as its distance from the Sun increases.