Two spherical planets P and Q have the s...

Two spherical planets P and Q have the same uniform density `rho,` masses `M_p and M_Q` and surface areas A and 4A respectively. A spherical planet R also has uniform density `rho` and its mass is `(M_P + M_Q).` The escape velocities from the plantes P,Q and R are `V_P V_Q and V_R` respectively. Then

`V_Q gt V_R gt V_P`

`v_R gt v_Q gt V_p`

`V_R//V_p=3`

`V_P//V_Q=frac(1)(2)`

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