There are three brothers who owned a parcel of a rice land in one of the barangays in Basey, Samar. They are about to start cultivating the land by plowing with hand tractors in preparation for the coming planting season. Suppose the eldest brother can plow the rice field in 3 days alone, the second brother in 4 days and the youngest brother in 6 days, how long will it take them if they will plow together at the same time?
