The radii of a planet and its satellites are 2r and r and their densities are rho and 2 rho respectively. Their centres are separated by a diatance d. The minimum speedwith which a body should be projected from the mid point of the line joining their centres so that the body escapes to infinity is (G - universal gravitational constant)

The radii of a planet and its satellites are 2r and r and their densit

1.	The radii of a planet and its satellites are 2r and r and their densities are rho and 2 rho respectively. Their centres are separated by a diatance d. The minimum speedwith which a body should be projected from the mid point of the line joining their centres so that the body escapes to infinity is (G - universal gravitational constant)
Answer» `4[sqrt((10G PI r^(3) rho)/(3D))]` `sqrt((10 G pi r^(3) rho)/(3d))` `2[sqrt((10G pi r^(3) rho)/(d))]` `(1)/(4)[sqrt((10G pi r^(3) rho)/(3d))]` Answer :A