Aptitude - Problems on Ages - Discussion
Discussion Forum : Problems on Ages - General Questions (Q.No. 10)
10.
Sachin is younger than Rahul by 7 years. If their ages are in the respective ratio of 7 : 9, how old is Sachin?
Answer: Option
Explanation:
Let Rahul's age be x years.
Then, Sachin's age = (x - 7) years.
 |
x - 7 | = | 7 |
| x | 9 |
9x - 63 = 7x
2x = 63
x = 31.5
Hence, Sachin's age =(x - 7) = 24.5 years.
Discussion:
48 comments Page 3 of 5.
Akshata said:
1 decade ago
Even if keep sachin's age as x years then rahul will be (x+7) yrs
So, it will be,
..x/x+7 = 7/9
9x = 7x + 49,
2x = 49,
x = 24.5
direct answer.
So, it will be,
..x/x+7 = 7/9
9x = 7x + 49,
2x = 49,
x = 24.5
direct answer.
Madhuri said:
1 decade ago
Let sachin be x and rahul age be x+7 since he is older than rahul.
x/x+7=7/9
9x=7x+49
9x-7x=49
2x=49
x=24.5.
Therefore sachin age is 24.5.
x/x+7=7/9
9x=7x+49
9x-7x=49
2x=49
x=24.5.
Therefore sachin age is 24.5.
Bhanu said:
1 year ago
Let Sachin's age be x.
Let Rahul's age be y.
y = x + 6,
x/y = 7/9,
x/(x + 7) = 7/9,
9x = 7x + 49,
2x = 49.
x = 24.5 years.
Let Rahul's age be y.
y = x + 6,
x/y = 7/9,
x/(x + 7) = 7/9,
9x = 7x + 49,
2x = 49.
x = 24.5 years.
(3)
V S Nayak said:
1 decade ago
Hello Everyone.
All answers and methods are correct but the way you guys solved in different way thats your intelligent.
All answers and methods are correct but the way you guys solved in different way thats your intelligent.
Sash said:
1 decade ago
Let the age of Sachin be x
Then,Rahul's age wil be (x+7)
Implies x/x+7=7/9
9x=7x+49
2x=49
Therefore x=24.5,Sachin's age
Then,Rahul's age wil be (x+7)
Implies x/x+7=7/9
9x=7x+49
2x=49
Therefore x=24.5,Sachin's age
Avinash said:
1 decade ago
Another method is:
Their age ratio is 7:9, and sachin is 7 year younger
7x + 7 = 9x
2x = 7
x = 3.5
7 X 3.5 = 24.5
Their age ratio is 7:9, and sachin is 7 year younger
7x + 7 = 9x
2x = 7
x = 3.5
7 X 3.5 = 24.5
Satish choudhary said:
1 decade ago
7:9 difference in the ratio is 2. And we know that the diff. of age 7.
7/2 we get 3.5.
3.5*7 = 24.5.
So easy.
7/2 we get 3.5.
3.5*7 = 24.5.
So easy.
Affrin said:
1 decade ago
"lesser age" represent --> younger
"older" --> it represent the current age
"older" --> it represent the current age
Bharath said:
7 years ago
Let Sachin's age be ='x'.
And Rahul's age be =' x+7'.
x/(x+7) = 7/9,
9x = 7x + 49,
2x = 49,
x = 24.5.
And Rahul's age be =' x+7'.
x/(x+7) = 7/9,
9x = 7x + 49,
2x = 49,
x = 24.5.
(4)
Suresh said:
3 years ago
Sachin. Rahul.
(X-7). X.
7 9.
9x-63=7x.
9x-7x=63.
2x=63.
Rahul=x=63/2=31.5.
Sachin=31. 5-7. 0=24.5.
(X-7). X.
7 9.
9x-63=7x.
9x-7x=63.
2x=63.
Rahul=x=63/2=31.5.
Sachin=31. 5-7. 0=24.5.
(3)
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