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 3 of 5.
Karim mirazul said:
1 decade ago
In question its said that Sachin is younger than Rahul.
So Sachin = x ages.
As per question, that means Rahul is 7 year elder than Sachin = x+7.
x/x+7 = 7/9.
9x = 7x+49.
2x = 49.
x = 24.5.
So Sachin = x ages.
As per question, that means Rahul is 7 year elder than Sachin = x+7.
x/x+7 = 7/9.
9x = 7x+49.
2x = 49.
x = 24.5.
Prathyusha said:
1 decade ago
Can anyone explain me?
Father's age is 5 times the son's age means 5 (x) but why x+6?
Father's age is 5 times the son's age means 5 (x) but why x+6?
Pardeshi said:
1 decade ago
My best way is that the ratios difference is 2.
So result is 7 years older so 1 ratio = 7/2 years, = 3.5 years.
So Sachin's age is from ratio = 3.5*7 = 24.5 answer.
So result is 7 years older so 1 ratio = 7/2 years, = 3.5 years.
So Sachin's age is from ratio = 3.5*7 = 24.5 answer.
Gowthami said:
1 decade ago
Present age of Rahul is x.
Sachin is 7 years older than Rahul so x+7.
Their ratio is 7:9.
x/x+7 = 7/9 cross multiplication is 9x = 7x+49.
9x-7x = 2x. So x = 49/2 = 24.1/2 = 24.5.
So this is my suggestion I hope you all are clear with that.
Sachin is 7 years older than Rahul so x+7.
Their ratio is 7:9.
x/x+7 = 7/9 cross multiplication is 9x = 7x+49.
9x-7x = 2x. So x = 49/2 = 24.1/2 = 24.5.
So this is my suggestion I hope you all are clear with that.
PRABIR said:
1 decade ago
Friends.
Sachin is younger than Rahul 7 years.
Their ratio is 7:9.
Let Sachin = 7.
Rahul = 9.
Their difference = 2.
Now 2 is difference is 7.
1 is = 7/2 = 3.5.
Sachin is 7 = 7*3.5 = 24.5.
Sachin is younger than Rahul 7 years.
Their ratio is 7:9.
Let Sachin = 7.
Rahul = 9.
Their difference = 2.
Now 2 is difference is 7.
1 is = 7/2 = 3.5.
Sachin is 7 = 7*3.5 = 24.5.
Kinjal said:
1 decade ago
Here Rahul should suppose to b "X".
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.
Affrin said:
2 decades ago
"lesser age" represent --> younger
"older" --> it represent the current age
"older" --> it represent the current age
Anish said:
2 decades ago
Simple method..
Let the peresent ages of sachin and rahul be 7x and 9x
sachin is younger than rahul in 7 years
So 9x-7x=7
2x=7
x=3.5
Sachins age= 7x= 7*3.5=24.5
Let the peresent ages of sachin and rahul be 7x and 9x
sachin is younger than rahul in 7 years
So 9x-7x=7
2x=7
x=3.5
Sachins age= 7x= 7*3.5=24.5
Rupali said:
2 decades ago
if sachin is younger than rahul, this means that his age is less than rahul,i.e. >7
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