What if i exceed the required time 300 hours and i haven't finish my projects?

i’m having a short time to finish my projects and currently im still at the challenge of responsive web design and haven’t done yet cause i’m still on the topic lesson “responsive web design principle” and it’s been already 20 days since i started the challenges from the beginning. I haven’t started any projects yet

Please do not create duplicate topics for the same challenge/project question(s). This duplicate topic has been unlisted.

Thank you.