A piece of metal weight $46\, gm$ in air, when it is immersed in the liquid of specific gravity $1.24$ at $27°C$ it weighs $30\, gm.$ When the temperature of liquid is raised to $42°C$ the metal piece weight $30.5\, gm,$ specific gravity of the liquid at $42°C$ is $1.20,$ then the linear expansion of the metal will be

  • A

    ${3.316 × 10-5/ }{°C^{-1}}$

  • B

    ${2.316 × 10-5 }{°C^{-1}}$

  • C

    ${4.316 × 10-5 }{°C^{-1}}$

  • D

    None of these

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