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:
51 comments Page 4 of 6.
Vanita Sawant said:
2 decades 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:
2 decades ago
Hey vanita you are correct good I also solved my problem as like you.
Sash said:
2 decades 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:
2 decades 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:
2 decades 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.
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.
Kinjal said:
1 decade ago
Here Rahul should suppose to b "X".
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