Aptitude - Problems on Ages - Discussion

Discussion Forum : Problems on Ages - General Questions (Q.No. 11)
11.
The present ages of three persons in proportions 4 : 7 : 9. Eight years ago, the sum of their ages was 56. Find their present ages (in years).
8, 20, 28
16, 28, 36
20, 35, 45
None of these
Answer: Option
Explanation:

Let their present ages be 4x, 7x and 9x years respectively.

Then, (4x - 8) + (7x - 8) + (9x - 8) = 56

20x = 80

x = 4.

Their present ages are 4x = 16 years, 7x = 28 years and 9x = 36 years respectively.

Discussion:
41 comments Page 4 of 5.

Swathi hj said:   6 years ago
Can any one explain how that -8 comes.
(1)

Karthika.l said:   10 years ago
Please explain in easy way?

Ravi said:   1 decade ago
Why they minuses with 8?

Swetha said:   1 decade ago
Habib method is good:-).

Sumit said:   1 decade ago
@Habib method is good.

Ganesh said:   1 decade ago
Nice and easy method.

Payal said:   1 decade ago
Habib method was good

Ankit rathore said:   1 decade ago
Good explanation

Krati said:   4 years ago
Thanks everyone.
(1)

Neha said:   2 decades ago
How 20x comes?


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