Question

The length of a year on any planet is defined as the time interval the planet takes to make one revolution around the Sun. What is the length of a year on a planet whose orbital radius is four times Earth’s orbital radius?

1 : 1 Earth year

2 : 2 Earth years

3 : 4 Earth years

4 : 8 Earth years

5 : 0.5 Earth years

6 : 0.25 Earth years

7 : 0.125 Earth years

Answer 1

3. 4 Earth years.