The ratio of the weights.| Gravitation | JEE MAIN 2019

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JEE MAIN 2019

12-04-2019 S2

Question

The ratio of the weights of a body on the Earth's surface to that on the surface of a planet is $9: 4$. The mass of the planet is $\frac{1}{9}$ th of that of the Earth. If ' $R$ ' is the radius of the Earth, what is the radius of the planet? (Take the planets to have the same mass density)

Select the correct option:

A

$\frac{\mathrm{R}}{4}$

B

$\frac{R}{3}$

C

$\frac{\mathrm{R}}{9}$

D

$\frac{R}{2}$

✓ Correct! Well done.

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