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 3 of 6.
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.
Jilan said:
1 decade ago
Let Sachin's age be 'x' years.
Then, Rahul's age = (x+7) years.
x/x+7 =7/9 =>x=24.5 years.
Then, Rahul's age = (x+7) years.
x/x+7 =7/9 =>x=24.5 years.
Lili said:
1 decade ago
Sachin is younger than Rahul by 7 years.
So,
Respective ratio 7:9, So different ratio is 2.
2 = 7
So, 1=(7/2) 3.5
Then 7:9
7 * 3.5 = 24.5.
And
9 * 3.5 = 31.5.
So,
Respective ratio 7:9, So different ratio is 2.
2 = 7
So, 1=(7/2) 3.5
Then 7:9
7 * 3.5 = 24.5.
And
9 * 3.5 = 31.5.
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.
Bharath said:
10 months ago
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.
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.
Riya said:
1 month ago
Let's assume Sachin's age is = x.
Let the age of Rahul be = x + 7.
Their respective ages in the ratio 7 : 9.
x/x+7 = 7/9.
By solving the above equation, we get x = 24.5.
where the age of Sachin is 24.5.
Let the age of Rahul be = x + 7.
Their respective ages in the ratio 7 : 9.
x/x+7 = 7/9.
By solving the above equation, we get x = 24.5.
where the age of Sachin is 24.5.
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.
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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