Ice starts forming in lake with water at ${0^o}C$ and when the atmospheric temperature is $ - {10^o}C$. If the time taken for $1 \;cm$ of ice be $7$ hours, then the time taken for the thickness of ice to change from $1\; cm$ to $2\; cm$ is

  • A

    $7$ hours

  • B

    $14$ hours

  • C

    Less than $7$ hours

  • D

    More than $7$ hours

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  • [NEET 2017]

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