4. A metal rod has a length of 100cm at 200oC. At what temperature will its length be 99.4cm. If the linear expansivity of the material of the rod is 2 x 10−5C−1

A metal rod has a length of 100cm at 200oC. At what temperature will its length be 99.4cm. If the linear expansivity of the material of the rod is 2 x 10−5C−1
A. 200oC
B. 300oC
C. 100oC
D. -100oC

Correct Option: Answer is D

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