Question

Raj tells his son "5 years ago, I was 5 times as old as you were then. Also, 3 years from now, I shall be 3 times as old as you will be". Find their present ages.

Answer 1

Answer:

When a boy weighing 20 kgf sits at one end of a 4 m long see-saw, it gets depressed

at this end. How can it be brought to the horizontal position by a man weighing 40 kgf.

Answer 2

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Let his son's age age at present be x

Situation 1- Five years ago,

Our age = x - 5

Raj's age = 6(x - 5)

Raj's age = 6x - 30

Situation 2 - Five years later

His son's age = x + 5

Raj's age = 3 (x + 5) - 5

Raj's age = 3x + 15 -5

Raj's age = 3x + 10

6x - 30+ 10 = 3x + 10

6x - 30+10 - 10 = 3x

6x - 40 + 10 = 3x

6x -30 = 3x

6x - 3x = 30

3x = 30

x = 30/3

x = 10

Thus his son's age now is x = 10

Raj's age now = 6x - 30 +5 = (610) - 30 +5

= 60 - 30 + 5

= 30 + 5

= 35

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