Me i'm a bit stuck on this problem.

5 times when all 5 times are up its 7:30 which if 3/4 of a hour which is 45 and is that time4learning?

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.