Aptitude - Problems on Ages - Discussion
Discussion Forum : Problems on Ages - General Questions (Q.No. 1)
1.
Father is aged three times more than his son Ronit. After 8 years, he would be two and a half times of Ronit's age. After further 8 years, how many times would he be of Ronit's age?
Answer: Option
Explanation:
Let Ronit's present age be x years. Then, father's present age =(x + 3x) years = 4x years.
 |
(4x + 8) = | 5 | (x + 8) |
| 2 |
8x + 16 = 5x + 40
3x = 24
x = 8.
| Hence, required ratio = | (4x + 16) | = | 48 | = 2. |
| (x + 16) | 24 |
Discussion:
319 comments Page 15 of 32.
Madan said:
1 decade ago
Again Repeat in question after 8 year find then you should take equal then put the value of x then find the value of 2.
Vinay said:
1 decade ago
Why 5/2 is multiplied?
With (x+8) not with (4x+8). Someone above said to cross multiply 2 *(4x+8) but I dint get it.
With (x+8) not with (4x+8). Someone above said to cross multiply 2 *(4x+8) but I dint get it.
Basava said:
1 decade ago
In question it is mentioned that After 8 years he(means father) would be two and a half times (5/2)of Ronit's age....
Saiganesh murarishetty said:
7 years ago
For every 8 years father's age decrease by halftime of his son's age so after further 8 years (5/2) - (1/2) =2 times.
Vroom said:
1 decade ago
Two and half times means : 2.5.
Multiply both numerator and denominator by 2.
Thus,
2.5 x 2 / 1 x 2.
5/2 or 2.5.
Multiply both numerator and denominator by 2.
Thus,
2.5 x 2 / 1 x 2.
5/2 or 2.5.
Watson said:
6 months ago
He would be 2 (1/2) times of Ronit's age.
2 1/2 which is a mixed fraction. So it is written as [ (2*2) +1]/2 = 5/2.
2 1/2 which is a mixed fraction. So it is written as [ (2*2) +1]/2 = 5/2.
(8)
Prachi said:
1 decade ago
There are times when we take x & y both variable. So how to identify whether we have to use 1 variable or both?
Jon said:
10 years ago
If, X = 8 than, when son was 8 father was 24.
When son was 16 father will be 32.
How 32 is 2.5 multiplier of 16?
When son was 16 father will be 32.
How 32 is 2.5 multiplier of 16?
Kjkj tikhir said:
10 years ago
In the last step why no one is taking care of : After 8 years, he would be two and a half times of Ronit's age.
Aqeel Sadiq said:
1 decade ago
@Satyam.
Consider a ratio a:b, in x years given ratio will be ax:bx.
After 8 years it will be ax+8:bx+8.
Consider a ratio a:b, in x years given ratio will be ax:bx.
After 8 years it will be ax+8:bx+8.
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