The sum of the present age of a father and his son is 100 years. 5 years ago their age was in the ratio of 2 : 1. After 10 years the ratio of the age of father to that of his son will be?
Answer & explanation
Correct answer: option 1
⇒ Sum of present age = 100 yrs
⇒ 5 years ago the sum = 100 - 10 = 90years
ATQ,
F S
Age 2 : 1 ⇒ 3R = 90 ⇒ 1R = 30
↓ ↓
×30 ×30
60 30 (5 years ago)
+15 +15
75 45 (after 10 years)
Ratio ⇒ 75 : 45 ⇒ 5 : 3