RRB Group-D Model Paper 15 with answers for online practice

Let their present age be measured in terms of x.
Ages of A and B differ by 6 and are in the ratio 3 : 5.
According to question:
5x – 3x = 6
⇒ 2x = 6
⇒ x = 3
Sum of their ages = (3 + 5)x = 8x = 8 × 3 = 24
Hence, ‘24’ is the correct answer.