The radius and acceleration due to gravity of the moon are `1/4` and `1/5` that of the earth, the ratio of the mass of the earth to mass of the moon is

The radius and acceleration due to gravity of moon are 1/4 and 1/5 that of earth. The ratio of the mass of earth to mass of moon is

If acceleration due to gravity on the surface of moon is (1//5)^("th") that at the surface of the earth and radius of the moon is (1//4)^("th") that of the earth, then the ratio of the mass of the earth to mass of moon is

The ratio of the radius of the earth to that of the motion is 10. the ratio of the acceleration due to gravity on the earth to that on the moon is 6. The ratio of the escape velocity from the earth's surface to that from the moon is

The ratio of the radius of the earth to that of the motion is 10. the ratio of the acceleration due to gravity on the earth to that on the moon is 6. The ratio of the escape velocity from the earth's surface to that from the moon is

An astronaut on the moon measures the acceleration due to gravity to be 1.7 ms^(-2) . He known that the radius of the moon is about 0.27 times that of the earth . Find the ratio of the mass of the earth to that of the moon , if the value of g on the earth's surface is 9.8 ms^(-2) .