Given Information:

Autonomous consumption $\left(\overline{\mathrm{C}}\right)=100$
Marginal Propensity to Consume $\left(\mathrm{MPC}\right)=0.6$
Equilibrium level of Income( $\mathit{Y}$ ) $=\mathrm{₹}2000$
Autonomous Investment $\left(\mathrm{I}\right)=\mathrm{₹}300$
At equilibrium level, $\mathrm{Y}=\mathrm{C}+\mathrm{I}$
Thus,$\mathrm{₹}2000=\mathrm{₹}1300+\mathit{I}$
$\mathit{I}=\mathrm{₹}\left(2000-1300\right)$
$\mathrm{I}=\mathrm{₹}700$
At this level of income, $\mathrm{Y}$ should be $\mathit{₹}700$ but it is given $\mathit{₹}300$ which is not valid.
Working Note:
$\mathrm{C}=\overline{\mathrm{C}}+\mathit{b}\mathrm{Y}$
$=\mathit{₹}100+0.6\left(2000\right)$
$=\mathit{₹}100+1200$
$=\mathit{₹}1300$