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:
322 comments Page 16 of 33.
Srikath said:
1 decade ago
First time more than 3 years of his son's age, after 8 years 2 and 1/2 years of Ronit age. Then finally 2 times of his son's age.
If you observe 1/2 times decreasing in ratio so its only guess.
If you observe 1/2 times decreasing in ratio so its only guess.
TUHIN PALI said:
1 decade ago
I solved in this way.
Per 8 years age decrease: (3x-5x/2) = x/2.
"1" " " x/16.
After 16 years = 16*x/16 = x.
3x-x = 2x.
After 16 years. So 2 times of Ronit's age. As father's age x.
Per 8 years age decrease: (3x-5x/2) = x/2.
"1" " " x/16.
After 16 years = 16*x/16 = x.
3x-x = 2x.
After 16 years. So 2 times of Ronit's age. As father's age x.
Kjkj tikhir said:
1 decade 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.
Vishal Singh said:
1 decade ago
How is it (4x + 8) = 5/2(x +8)?
It should be multiplied in 5/2(4x +8). Because he is the age of father.
Any body explain?
It should be multiplied in 5/2(4x +8). Because he is the age of father.
Any body explain?
KP Karthick said:
1 decade ago
How you get 5?
Vinitha said:
1 decade ago
Any shortcut to solve this type of problem? please share.
Yash Anand said:
1 decade ago
Can anybody tell me the shortest trick to solve this question? I mean in less than a min.
Himank said:
1 decade ago
@Neeraj you are wrong.
If it is 3x time of the child age then it is 3x.
But it is mentioned 3x times more than the sons age then it is 4x.
(3x+x).
If it is 3x time of the child age then it is 3x.
But it is mentioned 3x times more than the sons age then it is 4x.
(3x+x).
Neeraj said:
1 decade ago
Father's age is = 4x, because.
Let the age of child is x.
And given in question is age of father 3x time of the child age.
Then x+3x = 4x.
Let the age of child is x.
And given in question is age of father 3x time of the child age.
Then x+3x = 4x.
Khan said:
1 decade ago
Now review this Concept if you absorb it. It will be very helpful,
3:1.
5:2.
As the above ratio is not proportion so to proportionate it.
(3:1)*3 => 9:3.
(5:2)*2 => 10:4.
(9-10) = 1 but actual its 8 year difference.
Hence x = 8.
Now multiply 8 to the above ratio (not the original one but after proportionate one) and get answer.
It seems lengthy but it hardly take 1 minute to get answer hope you enjoy, ask me in detail if any.
3:1.
5:2.
As the above ratio is not proportion so to proportionate it.
(3:1)*3 => 9:3.
(5:2)*2 => 10:4.
(9-10) = 1 but actual its 8 year difference.
Hence x = 8.
Now multiply 8 to the above ratio (not the original one but after proportionate one) and get answer.
It seems lengthy but it hardly take 1 minute to get answer hope you enjoy, ask me in detail if any.
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