There has been a recent advancement in the field of usage of H$-$CNG to drive vehicles. The

government of Delhi has used H$-$CNG to run public buses. With respect to HHV of Hydrogen and

CNG$,$ obtain an expression of HHV of HCNG$.$ Hence find the HHV of $20\%-80\%$ H$-$CNG$.$

Further, consider a minibus that uses this fuel at an efficiency of $40\%.$ It is known that

approximately $4$ kWh of useful energy is needed to run for $5$ km$.$ In such a case, how much

moisture$-$free fuel will the minibus consume to complete a journey of $50$ km$?($HHV of CNG: $50$

MJ kg$-1$There has been a recent advancement in the field of usage of $H-CNG$ to drive vehicles. The

government of Delhi has used $H-CNG$ to run public buses. With respect to $HHV$ of Hydrogen and

$CNG,$ obtain an expression of HHV of HCNG$.$ Hence find the HHV of $20\%-80\%H-CNG.$

Further, consider a minibus that uses this fuel at an efficiency of $40\%.$ It is known that

approximately $4kWh$ of useful energy is needed to run for $5km.$ In such a case, how much

moisture$-$free fuel will the minibus consume to complete a journey of $50km?($HHV of CNG: $50$

MJ $k{g}^{-1})$