Two spherical planets P1 and P2 have the same uniform density ρ , masses m1 and m2 and surface areas A and 4A respectively . A spherical planet P3 also has uniform density ρ and its mass is (M1 + M2). The escape velocity form the planets P1 , P2 and P3 are v1 , v2 and v3 respectively. Then

Q: Two spherical planets P1 and P2 have the same uniform density ρ , masses m1 and m2 and surface areas A and 4A respectively . A spherical planet P3 also has uniform density ρ and its mass is (M1 + M2). The escape velocity form the planets P1 , P2 and P3 are v1 , v2 and v3 respectively. Then

(a) v2 > v3 > v1

(b) v3 > v2 > v1

(c) v3/v1 = 3

(d) v1/v2 = 1/2

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Ans: (b) , (d)