Question

After 20 years Manoj will be 5 times as old as he is now. Find his present age.
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Answer 1

Step-by-step explanation:

Let the present age of Manoj be x years

20 years after,

Manoj's age = x+20 years

Now,

(x+20) = 5*x

x+20 = 5x

x/5 + 4 = x

4 = x - x/5

4 = (5x - x)/5

4 = 4x/5

20 = 4x

x = 5 years

Hence, present age of Manoj is 5 years

Answer 2

$Present \: age \: of \: Manoj = x \: years$

$After \: 20 \: years , \\His \: age \: will \:be = (20+x) \: years$

/* According to the problem given */

$5x = x+20$

$\implies 5x - x = 20$

$\implies 4x = 20$

$\implies x = \frac{20}{4}$

$\implies x = 5\: years$

Therefore.,

$\red{Present \: age \: of \: Manoj}\\\green { = 5\: years }$

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