A diesel fuel has same ignition delay as that of blend of two reference fuels namely $56 \%$ n-cetane and $44 \%$ hepta-methylnonane. The cetane number of the diesel fuel is_____________
A diesel fuel has same ignition delay as that of blend of two reference fuels namely $56 \%$ n-cetane and $44 \%$ hepta-methylnonane. The cetane number of the diesel fuel is_____________