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 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)
a) 

b) 

c) 

d) 

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 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)
a) 

b) 

c) 

d) 
