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Surface Area of a Cylinder

A thin metal ...

Question

A thin metal rod fixed between two walls has the crack in the middle as shown figure (1). Therefore, when temperature changes by $32^{o} F$ it bends at the center as shown in the figure (2). If its temperature coefficient of linear expansion is $32 \times 10^{- 6} /^{o} C$ , find how much its center rises in (cm)

A

2 cm

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B

4 cm

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C

6 cm

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D

9 cm

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Solution

The correct option is D 9 cm

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