A father is now three times old as his son. Five years back he was four times as old as his son. The age of the son in years is

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A father is now three times old as his son. Five years back he was four times as old as his son. The age of the son in years is

A23

B15

C18

D20

Answer:

B. 15

Read Explanation:

Let sons age be x year and fathers age 3x year five years ago, father's age = (3x - 5) year son's age = x - 5year (3x - 5) = 4(x - 5) 3x - 5 = 4x - 20 x = 15

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