Algebra
Aptitude

 Back to Questions
Q.

If Dennis is 1/3 rd the age of his father Keith now, and was 1/4 th the age of his father 5 year ago, then how old will his father Keith be 5 year from now?

 A.

45 year

 B.

40 year

 C.

55 year

 D.

50 year

 Hide Ans

Solution:
Option(D) is correct

Let the present age of Dennis and his father be $x$ and $y$ respectively.

and

\((x-5)=\dfrac{(y-5)}{4}\)

On solving both equation we get $y= 45$ year.

Hence, required age $=(y+5)=$ 50 year


(1) Comment(s)


Akki
 ()

you havent included one equation it is

x=(1/3)y