If r denotes the mean distance of a planet from the sun and T is the time period of planet, then

The period of revolution of a planet around the sun is 8 times that of the earth. If the mean distance of that planet from the sun is r, then mean distance of earth from the sun is

The period T and mean distance R of a planet from the sun are related by

If a and b are the nearest and farthest distances of a planet from the sun and the planet is revolving in an elliptical orbit, then square of the time period of revolution of that planets is directly proportional to

The mean distance of two planets A and B from the sun is 2 and 4 times the distance of the Earth from the sun, respectively. Find the ratio of the time taken by the two planets to make one revolution around the sun.