Astronomers discover a new planet which has three moons. The time that each one takes to complete one full revolution around the planet is shown below. If they are in the position shown above at this moment, after how many days will the three of them again be exactly in the same position next? a) 25 days b) 30 days SECTIO c) 300 days 30 days - 25 days →20 days d) 600 days please help