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 1 of 5.
Bhanu said:
1 year ago
Let Sachin's age be x.
Let Rahul's age be y.
y = x + 6,
x/y = 7/9,
x/(x + 7) = 7/9,
9x = 7x + 49,
2x = 49.
x = 24.5 years.
Let Rahul's age be y.
y = x + 6,
x/y = 7/9,
x/(x + 7) = 7/9,
9x = 7x + 49,
2x = 49.
x = 24.5 years.
(3)
Keerthika senthur said:
1 year ago
Let's take Sachin is 7x and Rahul is 9x.
so, Sachin is 7 years younger than Rahul
i.e 9x - 7 = 7x
2x = 7.
x = 7/ 2.
= 3.5.
so, 7*3.5= 24.5 9sachin's age is 24.5
so, Sachin is 7 years younger than Rahul
i.e 9x - 7 = 7x
2x = 7.
x = 7/ 2.
= 3.5.
so, 7*3.5= 24.5 9sachin's age is 24.5
(12)
Suresh said:
3 years ago
Sachin. Rahul.
(X-7). X.
7 9.
9x-63=7x.
9x-7x=63.
2x=63.
Rahul=x=63/2=31.5.
Sachin=31. 5-7. 0=24.5.
(X-7). X.
7 9.
9x-63=7x.
9x-7x=63.
2x=63.
Rahul=x=63/2=31.5.
Sachin=31. 5-7. 0=24.5.
(3)
Chandra hero said:
3 years ago
2p = 7
Then,
1p= 3.5
Therefore 9 * 3.5 = 31.5-7 = 24.5.
Then,
1p= 3.5
Therefore 9 * 3.5 = 31.5-7 = 24.5.
(17)
Suman said:
3 years ago
Thanks everyone for explaining the answer.
(2)
Prakash said:
4 years ago
Thank you @Anish.
(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)
Akansha said:
6 years ago
Let Sachin's age be x.
And Rahul's age be x+7,
So, x/x+7=7/9,
9x=7x+49,
X=24.5.
And Rahul's age be x+7,
So, x/x+7=7/9,
9x=7x+49,
X=24.5.
(2)
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.
Bharath said:
7 years ago
Let Sachin's age be ='x'.
And Rahul's age be =' x+7'.
x/(x+7) = 7/9,
9x = 7x + 49,
2x = 49,
x = 24.5.
And Rahul's age be =' x+7'.
x/(x+7) = 7/9,
9x = 7x + 49,
2x = 49,
x = 24.5.
(4)
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