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:
327 comments Page 6 of 33.
DINESH BAWA said:
7 years ago
Answer is 2.
ratio
F:S
3:1 After 8 yr.
5:2
(check differance |3-5|=2 & |1-2|=1 we know that ratio diff. must be same bcoz father age +8 with son age also +8 yr).
F:S
9:3 - - - >(x3)
10:4 - - - > (x2)
diff. =1 because of +8yr.
i.e 1=8.
The resent age father 3x8=24 + after 8 yr = 32.
The present age son 1x8=8 + after 8 yr = 16.
F/S=32/16= 2.
ratio
F:S
3:1 After 8 yr.
5:2
(check differance |3-5|=2 & |1-2|=1 we know that ratio diff. must be same bcoz father age +8 with son age also +8 yr).
F:S
9:3 - - - >(x3)
10:4 - - - > (x2)
diff. =1 because of +8yr.
i.e 1=8.
The resent age father 3x8=24 + after 8 yr = 32.
The present age son 1x8=8 + after 8 yr = 16.
F/S=32/16= 2.
(1)
Durga said:
6 years ago
Let Rohit present age = x.
Father's present age=x+3x=4x.
(Because they mentioned he is 3 times more than Rohit's age not 3 times Rohith age so it's not 3x but its x+3x=4x).
After 8 yrs means Rohith age=x+3.
Father age=4x+3.
Father age is 2 1/2 times means( 2*2+1)/2=5/2 times,
so 4x+8=5/2*(x+8),
8x+16=5x+40,
3x=24,
x=8.
After another 8 yrs.
Father age/rohith age=(4x+16) / (x+16)
Fa / ra=(48/24) [since x=8].
Therefore father age=2 * Rohith age.
So answer is 2.
Father's present age=x+3x=4x.
(Because they mentioned he is 3 times more than Rohit's age not 3 times Rohith age so it's not 3x but its x+3x=4x).
After 8 yrs means Rohith age=x+3.
Father age=4x+3.
Father age is 2 1/2 times means( 2*2+1)/2=5/2 times,
so 4x+8=5/2*(x+8),
8x+16=5x+40,
3x=24,
x=8.
After another 8 yrs.
Father age/rohith age=(4x+16) / (x+16)
Fa / ra=(48/24) [since x=8].
Therefore father age=2 * Rohith age.
So answer is 2.
(1)
Prateek said:
10 months ago
4x + 8 = 2.5x + 20.
1.5x = 12,
x = 12/1.5
x = 8.
24/48 = 1/2.
1.5x = 12,
x = 12/1.5
x = 8.
24/48 = 1/2.
(1)
Ayush Pandey said:
8 months ago
Very clear, thanks all for explaining the answer.
(1)
Pranali said:
5 months ago
Yes, I agree with you @Janarthanan.
(1)
Prakash Chile said:
2 decades ago
Father is aged three times more than his son Ronit
if Ronit's age = x then Father's age = 3x
But Explanation Father's age = 4x
How is it possible?
if Ronit's age = x then Father's age = 3x
But Explanation Father's age = 4x
How is it possible?
Krithika said:
2 decades ago
It is explained 3 times more than his son. so 4x.
Vinoth said:
2 decades ago
How 4x ?
Arru said:
2 decades ago
How you got 5/2 (x+8)?
Mahesh said:
2 decades ago
It is specified in the problem father age two and a half times of ronit's age.
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