1
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
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The ratio of accelerations due to gravity g1 : g2 on the surfaces of two planets is 5 : 2 and the ratio of their respective average densities $${{\rho _1}}$$ : $${{\rho _2}}$$ is 2 : 1. What is the ratio of respective escape velocities v1 : v2 from the surface of the planets?
A
5 : 2
B
$${\sqrt 5 }$$ : $${\sqrt 2 }$$
C
5 : 2$${\sqrt 2 }$$
D
25 : 4
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