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The weight W of a certain stock of fish ...

The weight W of a certain stock of fish is given by W = nw, where n is the size of stock and w is the average weight of a fish. If n and w change with time t as n = `2t^(2)+3` and `w=t^(2)-t+2`, then the rate of change of W with respect to t at t = 1, is

A

1

B

13

C

5

D

8

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The correct Answer is:
B
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