Center of Mass Rowboat Question...Please Help! Can someone please help with below question? I really don't know where to begin... When empty, a 166 kg rowboat is symmetrical. A boy of mass 70.5 kg sits 2.1 m from the center of mass of the rowboat toward the front of the boat, and a girl of mass 68.8 kg sits 2.38 m from the center of mass of the rowboat toward the rear of the boat. Find x, distance from center mass of the emptyt rowboat to the center of mass of the rowboat-plus-kids system. I know the equation for center of mass [xcm = m1x1 + m2x2 + ... / m1 + m2 + ...] but I don't know where to start since the L of the rowboat is not given. Please help!!