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Finding Unknown

Ravi's age wa...

Question

Ravi's age was one-third of his father's 18 years ago. Now he is half the age of his father. What is the difference in the present ages of father and Ravi?

A

72

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B

36

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C

25

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D

20

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E

30

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Solution

The correct option is B 36
Let Ravi's present age be x
Then his father's present age = 2x
Then, (2x-18)=3(x-18)
Solve, x=36
So difference = 2x-x=x=36

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