$50\,g$ of copper is heated to increase its temperature by $10\,^{\circ}C$. If the same quantity of heat is given to $10\,g$ of water,the rise in its temperature is ........ $^{\circ}C$. (Specific heat of copper $= 420\,J\,kg^{-1}\,^{\circ}C^{-1}$,Specific heat of water $= 4200\,J\,kg^{-1}\,^{\circ}C^{-1}$)

  • A
    $5$
  • B
    $6$
  • C
    $7$
  • D
    $8$

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