Q. Assertion : When distance between two bodies is doubled and also mass of each body is doubled, gravitational force between them remains the same.
Reason : According to Newton’s law of gravitation, force is directly proportional to product of the mass of bodies and inversely proportional to the square of the distance between them.

 4098  213 Gravitation Report Error

Solution:

According to Newtons law of gravitation, . When , and all are doubled, , i.e. remains the same.