Well from now on I am gonna give my works on the question too. Sorry for all the previous posts guys.....really sorry!!!!



I have uploaded my way of solving the question too.....please tell me if i have followed the correct approach and found the right answer.....If not then please tell the correct method

 

The equivalent (Thevenin) resistance of 2Ω is correct but your equivalent (Thevenin) voltage is incorrect. It should be 30V.

Show how you arrived at the 10V shown in your working. Or re-check your working. Did you use superposition or another method?