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The density of core of a planet is rho(1...

The density of core of a planet is `rho_(1)` and that of the outer shell is `rho_(2)`. The radii of core and that of the planet are R and 2R respectively. Gravitational acceleration at the surface of planet is same as at a depth. The ratio between `(rho_(1))/(rho_(2))` is

A

`1 : 3`

B

` 2 : 5`

C

`5 : 3`

D

`7 : 3`

Text Solution

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The correct Answer is:
D
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