Twelve years hence a man will be four times as he was 12 years ago, then his present age is

25 years

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20 years

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28 years

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30 years

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Solution

The correct option is B 20 years
$L e t h i s p r e s e n t a g e b e x$
$12 y e a r s a g o h i s a g e w a s x - 12$
$12 y e a r s l a t e r h i s a g e w i l l b e x + 12$
$A s p e r p r o b l e m t h e f o l l o w i n g e q u a t i o n c a n b e f o r m e d$
$x + 12 = 4 (x - 12)$
$\Rightarrow x + 12 = 4 x - 48$
$\Rightarrow x - 4 x = - 12 - 48$
$\Rightarrow - 3 x = - 60$
$\Rightarrow x = 20$
His present age is 20 years.

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Twelve years hence a man will be four times as he was 12 years ago, then his present age is

The correct option is B 20 yearsLethispresentagebex12yearsagohisagewasx−1212yearslaterhisagewillbex+12Asperproblemthefollowingequationcanbeformedx+12=4(x−12)⇒x+12=4x−48⇒x−4x=−12−48⇒−3x=−60⇒x=20His present age is 20 years.