Final answer:
The synchronous speed of the 3-phase induction motor is 3000 rpm.
Step-by-step explanation:
The synchronous speed of a 3-phase induction motor can be calculated using the formula:
Sync Speed = (120 * Frequency) / Number of pole pairs
In this case, the frequency is 50 Hz and there are 2 pole pairs per phase, so the synchronous speed would be:
Sync Speed = (120 * 50) / 2 = 3000 rpm