A wall is made of two layers of thickness $1\ cm$ and $4\ cm$ and thermal conductivities $K$ and $3K$ respectively. If temperature difference for the wall is $50\ ^oC$ then temperature difference for the thin layer will be
A wall is made of two layers of thickness $1\ cm$ and $4\ cm$ and thermal conductivities $K$ and $3K$ respectively. If temperature difference for the wall is $50\ ^oC$ then temperature difference for the thin layer will be
- A
$\frac{120}{7}\ ^oC$
- B
$\frac{150}{7}\ ^oC$
- C
$\frac{180}{7}\ ^oC$
- D
None
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