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Prasad aged $50 y e a r s$ who had a daughter Sowjanya of $20 y e a r s$ . The number of years ago the age of Prasad was three times of his daughter is

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15

5

4

answer is C.

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Detailed Solution

The present age of prasad

= 50 y e a r s

The present age of his daughter $= 20 y e a r s$

Let the $x = y e a r s$ ago the age of prasad was three times of his daughter.

i.e. $50 - x = 3 (20 - x)$

$50 - x = 60 - 3 x$

$- x + 3 x = 60 - 50$

$2 x = 10$

$x = 5$

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