0 votes 0 votes A 1-bit full adder takes 20ns to generate carry out bit and 40ns to the sum bit. When four 1-bit full adders are cascaded , then the total time for additions is Digital Logic carry-ahead + – hem chandra joshi asked Sep 23, 2017 hem chandra joshi 621 views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply joshi_nitish commented Sep 23, 2017 reply Follow Share it will take 20*3 + 40 = 100ns 1 votes 1 votes hem chandra joshi commented Sep 23, 2017 i edited by hem chandra joshi Sep 23, 2017 reply Follow Share WHAT IF IS CARRY AHEAD LOOK ADDER? 0 votes 0 votes Please log in or register to add a comment.