Q. A hot liquid is to be cooled in a 1-1 shell and tube heat exchanger from 80 oC to 50 oC. Cooling water enters the tube side at 30 oC, and exits at 45 oC. The properties of the liquids are constant. Also, the overall heat transfer coefficient is same for counter-current and co- current modes. The percentage saving in heat transfer area for counter-current option with respect to the area of co-current option is
Ans: 26.5 to 27.5
![Determine the correctness (or otherwise) of the following Assertion [A] and the Reason [R]](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Determine-the-correctness-or-otherwise-of-the-following-Assertion-A-and-the-Reason-R.jpg)
