$A$ metal rod of length $2$$m$ has cross sectional areas $2A$ and $A$ as shown in figure. The ends are maintained at temperatures $100°C$ and $70°C$ . The temperature at middle point $C$ is...... $^oC$

80-66

  • A

    $80$

  • B

    $85$

  • C

    $90$

  • D

    $95$

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