Steam expands from $20$ bar, $250\backslash$deg C to pressure of $3$ bar. Nozzle efficiency is $90\%$ and exit

area is $3\mathrm{.}15$ cm$2$

$.$ Assuming supersaturated flow to be governed by pv

$1\mathrm{.}3=$ constant and

mean value of specific heat for supersaturated steam being $1\mathrm{.}93$ kJ$/$kg$.$K $,$ determine the

mass flow rate of steam on per minute basis.