Hi Krishna, welcome to the forum!
Your budgie has laid quite a lot of eggs! To answer your question, it usually takes around 3 weeks for the eggs to hatch. From the time after the first egg was laid.
To check if the eggs are fertile or not, put a flashlight against it to see if there is red veins developing inside the eggs. If you see the veins, it is fertile.
Good luck on getting the chicks. Please update the information and share photos with us.
