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1. |
Mass of the earth is 81 times the mass of the moon and distance between the earth and moon is 60 times the radius of the earth. If R is radius of the earth, then distance between the moon and the point on the line joining the moon and earth where the gravitational force becomes zero is |
A. | 30R |
B. | 15R |
C. | 6R |
D. | 5R |
Answer» D. 5R | |