What is the mass on earth if the mass of a man in moon is 55 Kg?

The mass of an object remains constant regardless of its location in the universe. Therefore, if a man has a mass of 55 kg on the Moon, he will also have a mass of 55 kg on Earth. However, his weight would differ due to the varying gravitational forces on the two celestial bodies. On Earth, the weight would be greater than on the Moon due to Earth's stronger gravity.