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 2 of 5.
Ahmedshaon said:
9 years ago
Let Sachin's age be x years.
Then, Rahul's age = (x + 7) years, As Sachin is 7 years less than Rahul.
x / x + 7 = 7 / 9,
9x = 7x + 49,
2x = 49,
x = 24.5.
Hence, Sachin's age = 24.5 years.
Then, Rahul's age = (x + 7) years, As Sachin is 7 years less than Rahul.
x / x + 7 = 7 / 9,
9x = 7x + 49,
2x = 49,
x = 24.5.
Hence, Sachin's age = 24.5 years.
(1)
Abhijeet kumar singh said:
8 years ago
Let Sachin age is = x year and Rahul age is x+7 year.
Then we can calculate by using the given respective ratio 7:9.
= x/x+7=7/9 when we solve this equation we got 24.5.
Then we can calculate by using the given respective ratio 7:9.
= x/x+7=7/9 when we solve this equation we got 24.5.
(1)
Pavi said:
5 years ago
Sachin and Rahul age be: 7x : 9x.
Gn, Sachin is seven yrs younger than Rahul
So, 9x -7 = 7,
X = 3.5.
By substituting x value in 7x we get an answer.
Gn, Sachin is seven yrs younger than Rahul
So, 9x -7 = 7,
X = 3.5.
By substituting x value in 7x we get an answer.
(1)
Prakash said:
4 years ago
Thank you @Anish.
(1)
Punya said:
1 decade ago
R-S = 7.
S/R = 7/9.
Where R = 9S/7.
Substitute in first equation:
9S/7-S = 7.
S = 24.5 years.
S/R = 7/9.
Where R = 9S/7.
Substitute in first equation:
9S/7-S = 7.
S = 24.5 years.
Refrist said:
6 years ago
Let Rahul age be x.
Sachin age be x+7.
Then thier ratio is x/x+7=7/9.
9x=7x +49.
X = 24.
Sachin age be x+7.
Then thier ratio is x/x+7=7/9.
9x=7x +49.
X = 24.
Lili said:
9 years 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.
Jilan said:
9 years 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.
Karim mirazul said:
10 years 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:
10 years 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?
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