What is the heat transfer area for the following setup?Given the thickness of fin = 5mm, diameter of inner and outer tube are 20mm and 40mm respectively and the length of tube is 1metre.

What is the heat transfer area for the following setup?Given the thick

1.	What is the heat transfer area for the following setup? Given the thickness of fin = 5mm, diameter of inner and outer tube are 20mm and 40mm respectively and the length of tube is 1metre.
A.	n<a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-exam-questions-answers-q12.png"><img alt="Diagram shown is Effectiveness & efficiency on the basis of the fin s efficiency" class="alignnone size-full wp-image-249770" height="267" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-exam-questions-answers-q12.png" width="270"/></a>
B.	0.3m<sup>2</sup>
C.	0.23m<sup>2</sup>
D.	0.123m<sup>2</sup>
E.	0.223m<sup>2</sup>
Answer» D. 0.123m<sup>2</sup>