A mixture of KOH and $Na_2CO_3$ solution required 15ml of N/20 HCl using phenolphthalein as indicator .The same amount of alkali mixture when titrated using methyl orange as an indicator required 25ml of same acid.Calculate the amount of KOH and $Na_2CO_3$ present in solution.

Question

$\begin{array}{1 1}(a)\;0.02g\;KOH,0.06g\;Na_2CO_3&(b)\;0.018g\;KOH,0.03g\;Na_2CO_3\\(c)\;0.014g\;KOH,0.053g\;Na_2CO_3&(d)\;0.018g\;KOH,0.06g\;Na_2CO_3\end{array}$