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A 250V, DC shunt motor on no-load, runs at a speed of 1000 rpm and takes a current of 5A the armature and shunt

A 250V, DC shunt motor on no-load, runs at a speed of 1000 rpm and takes a current of 5A the armature and shunt field resistances are 0.22 and 2502 respectively. Calculate the speed when the motor is on-load, and is taking current of 50A. Assume that the armature reaction weakens the field by 3%. Ans. 993.7rpm

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