The moons revolution around the earth is equal to how long?

One Mo(o)nth.

Such is the movement of the Moon, it orbits ( revolves) about the Earth in about 28 to 29 days. It also also rotates on its own axis in about the same time.

Because of these movements, we , on Earth, only ever see 61% of the Moon's surface. The remaining 39% has always beeen hidden from direct observation from Earth.

Because the Moon orbits the Earth in an inclined plane, of approximately 5 degrees. from the Earth's solar orbit, and also the Moon, like all other astronomic bodies orbits in an elliptical manner, it is sometimes nearer to us, and sometimes further away. Because of these two characteristics, the Moon's speed about the Earth varies. As a consequence, a lunar orbit can range from 27.33 days to 29.5 days.

Orbital Period (Sidereal) 27.321661 d

(27 d 7 h 43 min 11.5 s[1])

Orbital period (synodic) 29.530589 d

(29 d 12 h 44 min 2.9 s)