Question

Sunil and his father's age are in the ratio 3:7. Four years later the sum of their ages will be 78 years. What are their present ages?

• A. 24 and 56 years
• B. 18 and 42 years
• C. 21 and 49 years
• D. 27 and 63 years

Answer 1

The correct option is C

21 and 49 years

Let the age of Sunil = 3x

Then age of Sunil's father = 7x

Four years later the sum of their ages = 3x + 4 + 7x + 4 = 10x + 8 = 78

10x = 70,

x = 7

Present age of Sunil = 3 $\times$ 7 = 21 years

Present age of Sunil's father = 7 $\times$ 7 = 49 years