# Calculating speed of the rotor with slip

The question i'm having trouble with is:

Calculate the speed of the rotor of a 6 pole induction motor with a slip of 2.2%. The motor is connected to a 230V single-phase supply.

I am familiar with the table below and a certain formulae but i'm doing something incorrect and am confused on how to tackle this question.

Any formulaes or help would be appriciated as I am really stuck • "i'm doing something incorrect " Start with showing us what you do, even if you know it is incorrect. Homework question with no attempt at a solution will be closed. See also here Nov 2, 2019 at 10:07
• Which "certain formulae" have you tried? Do you know the supply frequency?
– user80875
Nov 2, 2019 at 13:53
• I'm voting to close this question as off-topic because this is a homework or study problem with no demonstration of attempt to solve?
– user80875
Nov 2, 2019 at 13:54
• If the voltage is 230V what is the likely supply frequency? Having got that go to your course documentation and look up the formula for slip.;
– RoyC
Nov 2, 2019 at 14:40
• the calculation im doing is 120-50hz/6 = 1000 Nov 3, 2019 at 0:40