Question

The ratio of father and son's age is 8: 5. The product of their ages is 2580
The ratio of their ages, 4 years ago is?
a) 4:5 b) 5:3 C) 6:7 d) 7:
8 e ) None of these​

Answer 1

Answer:

let father's age be 8x and son's age be 5x

40x^2 = 2580

x^2 = 64.5

x = 8

age of father = 8x = 64

age of son = 5x = 40

ratio of age 4 year ago = 60:36 = 15:9 = 5 : 3

ratio is 5:3

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