DRDO Multi tasking staff Model paper 4

Let Reetu's age 10 years ago be 'x' years.
Then, her mother's age 10 years ago = 5x years
(x + 10) + 6 = 3/7 × [(5x + 10) + 6]
x + 16 = 3/7 (5x + 16)
7x + 112 = 15x + 48
8x = 64
x = 8
Therefore, Reetu's mother's present age = (5x + 10) = (5 × 8 + 10) years = 50 years
Hence, Reetu’s mother’s age at present is 50 years.