1.

The rate of heat transfer through a pipe wall is given by, . For cylinder of very thin wall, q can be approximated by

A. <img src="/_files/images/chemical-engineering/heat-transfer/271-499-2.png">
B. <img src="/_files/images/chemical-engineering/heat-transfer/271-499-3.png">
C. <img src="/_files/images/chemical-engineering/heat-transfer/271-499-4.png">
D. <img src="/_files/images/chemical-engineering/heat-transfer/271-499-5.png">
Answer» E.


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