Father said to his daughter that when,I was of your age you were of age 4 and when you will be of my age I will be 79 years old.find the present age of father and daughter?
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First of all, let us assume that the present age of father & daughter is x and y. Now acc. to question,
Father Daughter
x y
y 4
79 x
Since these are the ages at the same time interval so the age difference after every interval must be the same.
i.e. x - y = y - 4 = 79 - x.
or, x - y = y - 4 ----------- (i)
or, y - 4 = 79 - x ----------- (ii)
Solving these two equations you'll get x = 54 i.e. present age of father and y = 29 i.e. present age of daughter.
Father Daughter
x y
y 4
79 x
Since these are the ages at the same time interval so the age difference after every interval must be the same.
i.e. x - y = y - 4 = 79 - x.
or, x - y = y - 4 ----------- (i)
or, y - 4 = 79 - x ----------- (ii)
Solving these two equations you'll get x = 54 i.e. present age of father and y = 29 i.e. present age of daughter.
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