A cylinder is made up of materials having thermal conductivity K. If it is coated upto thrice of its radius of a material of thermal conductivity k, then the equivalent thermal conductivity will be
1. (K + k)/ 2
2. 2Kk/ (K + k)
3. (K + 3k)/4
4. (K + 8k)/9

Asked by Mamali Nanda | 18th Jul, 2016, 09:04: PM

Expert Answer:

Answered by Romal Bhansali | 19th Jul, 2016, 06:14: PM