A rod of length $2m$ at $0^o C$ and having expansion coefficient $ \alpha = (3x + 2) \times 10^{-6}$ $ ^o C^{-1}$ where $x$ is the distance (in $cm$) from one end of rod. The length of rod at $20^o C$ is ......... $m$
A rod of length $2m$ at $0^o C$ and having expansion coefficient $ \alpha = (3x + 2) \times 10^{-6}$ $ ^o C^{-1}$ where $x$ is the distance (in $cm$) from one end of rod. The length of rod at $20^o C$ is ......... $m$
- A
$2.12$
- B
$3.24$
- C
$2.01$
- D
$3.12$
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