Five years ago, Total age of A, B, C and D = 45 × 4 = 180 years Present total age of A, B, C and D = 180 + 5 × 4 = 180 + 20 = 200 years Again, Present total age of A, B, C, D and X = 5 × 49 years = 245 years ∴ Present age of X = 245 – 200 = 45 years.