Sum of ages of 4 members of a family 5 yr ago = 94 yr ∴ Their present age with daughter = 94 + 4 × 5 = 94 + 20 = 114 yr Now, sum of their present age with daughter-in-law = 92 yr ∴ Age difference between daughter and daughter-in-law = 114 - 92 = 22 yr