A single-pass shell-and-tube condenser is required to condense 1kg/s of steam at 6224Pa, by using cooling water at 295K. If the allowable water temperature rise is 12K, determine the length of a condenser containing 3001in,18 gage brass tubes. Take the steam-side heat transfer coefficient as 6500W/m2K, and allow for 0.2mm-thick scale of conductivity 1.5W/mK on the inside wall