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plz give proper explanation ....
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option ( a ) is correct option
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Answer: a is correct answer
Explanation:Let w be angular velocity of planet and 'R' its radius.
v=wR at equator -----(1)
g=g0−w2Rg at equator g0 at poles
g02=g0−w2R
w2R=g02
v2=g0R2 (Substituting from (1))
But we know escape velocity
ve=2g0R−−−−√
=4v2−−−√
∴ve=2v
Hence a is the correct answer.
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