Aptitude - Problems on Ages - Discussion
Discussion Forum : Problems on Ages - General Questions (Q.No. 7)
7.
Six years ago, the ratio of the ages of Kunal and Sagar was 6 : 5. Four years hence, the ratio of their ages will be 11 : 10. What is Sagar's age at present?
Answer: Option
Explanation:
Let the ages of Kunal and Sagar 6 years ago be 6x and 5x years respectively.
| Then, | (6x + 6) + 4 | = | 11 |
| (5x + 6) + 4 | 10 |
10(6x + 10) = 11(5x + 10)
5x = 10
x = 2.
Sagar's present age = (5x + 6) = 16 years.
Discussion:
128 comments Page 7 of 13.
Sreekanth said:
5 years ago
No @Faruk.
He takes six year ago as 6x.
If we take present age as x=5.
Then six years ago in 6x we assign x=5 and it becomes 30.
How it will be right?
He takes six year ago as 6x.
If we take present age as x=5.
Then six years ago in 6x we assign x=5 and it becomes 30.
How it will be right?
Manikanth said:
1 decade ago
For some questions we are taking ago as + sign and some questions we are taking -sign could you please explain which sign we have to take? and why?
Satyajeet said:
1 decade ago
The word ago means before. So, we should subtract.
Hence, the equation should be.
(6x-6)+4/(5x-6)+4 = 11/10.
Please, Explain me, if I am wrong.
Hence, the equation should be.
(6x-6)+4/(5x-6)+4 = 11/10.
Please, Explain me, if I am wrong.
Prabhakaran said:
1 decade ago
(m-6) = (n-6)(6/5) --> 1.
(m+4) = (n+4)(11/10) --> 2.
Equating, 'm' we get,
(n-6)(6/5) + 6 = (n+4)(11/10) - 4.
Then n = 16 = Sagar's age.
(m+4) = (n+4)(11/10) --> 2.
Equating, 'm' we get,
(n-6)(6/5) + 6 = (n+4)(11/10) - 4.
Then n = 16 = Sagar's age.
Sujitha Barmavath said:
8 years ago
Data is insufficient. When It says 'n' years ago then It should be written like 'x-n' but not 'x+n'. Formula itself says '-' for n years ago.
Jatsho said:
3 years ago
The present age is not given.
So, the Present age = past age + years ago.
6x-6 means past age (6 years ago) and 6x+6 means Present age.
So, the Present age = past age + years ago.
6x-6 means past age (6 years ago) and 6x+6 means Present age.
(5)
Khaisar said:
1 decade ago
I've solved by taking present ages as x and y.
(x-6)/(y-6)=6:5
(x-2)/(y-2)=11:10
by solving these i got ans as 10
What is wrong in it?
(x-6)/(y-6)=6:5
(x-2)/(y-2)=11:10
by solving these i got ans as 10
What is wrong in it?
Sanjay said:
1 decade ago
Also why can't the age of sagar be 20 yrs at present, as we need to include 4 yrs from the question to get the age of sagar at present?
Niranj said:
1 decade ago
@Faruk explained clearly, see it @Bhuvana.
Here we are calculating the present of Sagar, so instead of subtraction they used addition.
Here we are calculating the present of Sagar, so instead of subtraction they used addition.
Karthik said:
9 years ago
I think (6x+10) means bringing the ages from past to present and then it was taken as present condition and +4 for the future age.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers