Can anyone explained me how gate delay is calculated in this link http://iitkgp.vlab.co.in/?sub=38&brch=120&sim=483&cnt=664
According me for 32 bit ripple carry adder,
gate delay = (32-1) Pcarry + Psum
Now Pcarry = 1-EXOR + 1-AND + 1-OR = 3 gate delay
and Psum = 1-EXOR + 1-EXOR = 2 gate delay
so gate delay = 31*3 + 2 = 95 but given is 65