Average of present age A, B and C is 14 years, while four years ago, average age of B, C and D was 15 years. If the sum of present of A and D is 27 years, then find the age of D five years hence will be (in years).

Correct option is B

Let present age of A, B, C and D be a, b, c & d respectively
a + b + c = 14 ×3=42 --- (i)
b + c + d = 15 ×3+4×3=57 ------(ii)
a + d = 27 -----(iii)
From (i) and (ii)
d – a = 15 ------(iv)
From (iii) and (iv)
d = 21
Required age = 21 + 5 = 26 years