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Q.

Density of planet is four times the density of earth and radius is 2 time that of Earth, the acceleration due to gravity on the surface of planet will be?

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a

2 times that on the surface of earth

b

8 times that on the surface of Earth

c

12 Times that on the surface of Earth

d

4 times that on the surface of Earth

answer is B.

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Detailed Solution

g=43πGRρ
gpge=RpρpReρe=2R×4ρRρ
gP=8ge

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