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 21 of 33.
Mantsss said:
1 decade ago
@Ibbu.
As said in the problem itself.,
father is two and a half years older than his son after 8 years.
So.,
2*(1/2)=((2*2)+1)/2=5/2.
Or you can think as - five divided by 2 always equals to, two and a half...!!!
Got it...??? :).
As said in the problem itself.,
father is two and a half years older than his son after 8 years.
So.,
2*(1/2)=((2*2)+1)/2=5/2.
Or you can think as - five divided by 2 always equals to, two and a half...!!!
Got it...??? :).
Nebin said:
1 decade ago
Present age s=24, f=72(3 times more than).
After 8 years s=32, f=80(now two and half times).
Again after 8 years s=40, f=88(now 2.2 times). I got like this please give correct answer..is it correct or not?
After 8 years s=32, f=80(now two and half times).
Again after 8 years s=40, f=88(now 2.2 times). I got like this please give correct answer..is it correct or not?
Ibbu said:
1 decade ago
Where is 5\2 coming from?
Doll said:
1 decade ago
We can say that father age = y(ronits age).
So (4x+16)= y(x+16).
i.e (4x+16)/(x+16) = y.
Here we know x value.
So we can calculate y value.
So (4x+16)= y(x+16).
i.e (4x+16)/(x+16) = y.
Here we know x value.
So we can calculate y value.
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.
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.
Akhila said:
1 decade ago
Why this last step = (4x+8+8)/(x+8+8) should be divisible only?
Chithra said:
1 decade ago
We have 4x+8 = x+8.
Further 8 years means we need to add another 8 on both side,
i.e.. 4x+8+8=x+8+8, which becomes 4x+16=x+16.
We can also write this as (4x+16)/(x+16). Then substitute the value of 8 in that we will get the answer.
Further 8 years means we need to add another 8 on both side,
i.e.. 4x+8+8=x+8+8, which becomes 4x+16=x+16.
We can also write this as (4x+16)/(x+16). Then substitute the value of 8 in that we will get the answer.
Darshana said:
1 decade ago
How you got ratio (4x+16)/(x+16) ?
Can you explain the last step of ratio.
Can you explain the last step of ratio.
Jyothi sajjan said:
1 decade ago
Hi @Rashmi (4x+8)is cross multiply with 2(denominator)then it becomes 8x+16. and, 5(numerator) is multiplied with (x+8)then it becomes 5x+40 this is the correct manner.
Have a nice day.
Have a nice day.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers