In 1977, when I joined the Marines, 50 push ups in the time you specified was pretty standard fare.
To pass a PFT (physical fitness test), 80 situps in 2 minutes was a pretty common goal, as well.
Now at 46 years old, I just did 50 push ups, to honor your thread, and our troops. It took me 4 minutes and 22 seconds.
It takes me over 5 minutes to do 80 situps, and I can just barely make all of them now. 🙁
Damn, I feel the age setting in.