Question

8. After 15 years, a man will be just four times as old as he was 15 years ago. What is his present age?
(B) 15 years
(C20 years
(A) 10 years
(D) 25 years
CO2​

Answer 1

Answer is:- 25 years

Step-by-step explanation:

x+15=4(x-15)

x+15=4x-60

x-4x=-60-15

-3x=-75

x=-75/-3

x=25 years old is his present age.

Answer 2

$\LARGE{\underline{\red{\sf{Answer}}}}$

$\fbox\orange{25\: years}$

_________________

$\LARGE{\underline{\red{\sf{Explanation}}}}$

Let the age of the man be x

His age fifteen years ago = (x – 15) years

His age after fifteen years = (x + 15) years

Given that "After 15 years, a man will be just four times as old as he was 15 years ago"

So, it will be 4(x – 15)

.

So , the equation we got is

=> 4(x – 15) = (x + 15)

=> 4x – 60 = x + 15

=> 4x – x = 15 + 60

=> 3x = 75

$=> x \:=\: \frac{75}{3}$

x = 25

Therefore, the age of the man is = $\fbox\orange{25\: years}$