A Celestial Object Called a Pulsar Emits Its Light in Short

Short Answer

A celestial object called a pulsar emits its light in short bursts that are synchronised with its rotation. A pulsar in the Crab Nebula is rotating at a rate of 30 revolutions/second. What is the maximum radius of the pulsar, if no part of its surface can move faster than the speed of light (3 *108 m/s)?