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:
50 comments Page 4 of 5.
Vanita Sawant said:
1 decade ago
Hey guys i've another method 2 solve d same problem
Let Sachin's age be 'x' years
Therefore, Rahul's age will be x+7 years
x + 7 = 9
x 7
7(x+7)=9x
7x+49=9x
2x=49
x=24.5
Hence Sachin's is 24.5 years old
Let Sachin's age be 'x' years
Therefore, Rahul's age will be x+7 years
x + 7 = 9
x 7
7(x+7)=9x
7x+49=9x
2x=49
x=24.5
Hence Sachin's is 24.5 years old
Mrs pallavi said:
1 decade ago
Hey vanita you are correct good I also solved my problem as like you.
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
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.
Sai said:
1 decade ago
Akshatha I think you are answr is very good. Direct way to get answer.
Sathish kumar said:
1 decade ago
This is a simplest way. Lets take x be sachin's age x+7 be rahuls age. Then,
x / (x+7) = 7/9.
=> 9x = 7x+49.
=> 2x = 49.
=> x = 24. 5 -----------> correct answer.
x / (x+7) = 7/9.
=> 9x = 7x+49.
=> 2x = 49.
=> x = 24. 5 -----------> correct answer.
Ramya devi said:
1 decade ago
Let us assume sachin's age be x and rahul's age be x+7, then.
x/x+7 = 7/9.
9x = 7(x+7).
9x = 7x+49.
9x-7x = 49.
2x = 49.
x = 49/2.
x = 24.5 This is the simplest and easiest to solve.
x/x+7 = 7/9.
9x = 7(x+7).
9x = 7x+49.
9x-7x = 49.
2x = 49.
x = 49/2.
x = 24.5 This is the simplest and easiest to solve.
Prachi said:
2 decades ago
Can you explain relation younger and older?
Bhoomika said:
1 decade ago
Hi,
Given ratio is sachin:rahul=7x:9x.
Sachin is 7yrs younger than rahul,
Then rahul age ie 9x will be,
9x=7x+7.
X=7/2.
Now, sachin age become 7x ie 7*7/2= 24.5.
Given ratio is sachin:rahul=7x:9x.
Sachin is 7yrs younger than rahul,
Then rahul age ie 9x will be,
9x=7x+7.
X=7/2.
Now, sachin age become 7x ie 7*7/2= 24.5.
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