A catapult on a level field tosses a 3 kg stone a horizontal distance of 100 m. A second 3 kg stone tossed in an identical fashion breaks apart in the air into 2 pieces, one with a mass of 1 kg and one with a mass of 2 kg. Both of the pieces hit the ground at the same time. If the 1 kg piece lands a distance of 180 m away from the catapult, how far away from the catapult does the 2 kg piece land ? Ignore air resistance.