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In a double pipe heat exchanger if the wall resistance can be neglected and the convective heat transfer coefficient on inner diameter basis of inner

In a double pipe heat exchanger if the wall resistance can be neglected and the convective heat transfer coefficient on inner diameter basis of inner pipe is 1 W/m2K and convective heat transfer coefficient on basis of outside diameter is 600W/m2K, Then overall heat transfer coefficient is Select one

: a. 601 W/m K

b. 600W/m K

c. 599 W/mK

d. 1 W/mK 2

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