1.

Harmonic mean temperature difference is given by

A. <span class="root"><i> T<sub>1</sub> </i>. <i> T<sub>2</sub></i></span>
B. <img src="/_files/images/chemical-engineering/heat-transfer/259-370-1.png">
C. <img src="/_files/images/chemical-engineering/heat-transfer/259-370-2.png">
D. <img src="/_files/images/chemical-engineering/heat-transfer/259-370-3.png">
Answer» C. <img src="/_files/images/chemical-engineering/heat-transfer/259-370-2.png">


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