should you eat food if we perform sradha on Ekadasi day

 what sastra says:

If Sradha comes on Ekadasi day , the one who performs Sradha , his wife  and children should definitely  take food on that day. Sradha which comes only yearly once is much more important than Ekadasi which comes twice a month. Pithru sesha will bless us and also give us the effect of observing Ekadasi.

http://brahminrituals.blogspot.com/2013/06/?m=1