A belt-driven DC shunt generator running at 300 rpm delivers 100 kW to a 200 V DC grid. It continues to run as a motor when the belt breaks, taking 10 kW from the DC grid. The armature resistance is 0.025 Ω, field resistance is 50 Ω and brush drop is 2 V. Ignoring armature reaction, the speed of the motor is _____ rpm. (Round off to 2 decimal places.)