There is formation of layer of snow $x\,cm$ thick on water, when the temperature of air is $ - {\theta ^o}C$ (less than freezing point). The thickness of layer increases from $x$ to $y$ in the time $t$, then the value of $t$is given by
There is formation of layer of snow $x\,cm$ thick on water, when the temperature of air is $ - {\theta ^o}C$ (less than freezing point). The thickness of layer increases from $x$ to $y$ in the time $t$, then the value of $t$is given by
- A
$\frac{{(x + y)(x - y)\rho L}}{{2k\theta }}$
- B
$\frac{{(x - y)\rho L}}{{2k\theta }}$
- C
$\frac{{(x + y)(x - y)\rho L}}{{k\theta }}$
- D
$\frac{{(x - y)\rho Lk}}{{2\theta }}$
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