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.
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)
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)
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)
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)
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)
Suman said:
3 years ago
Thanks everyone for explaining the answer.
(2)
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)
Mahesh Babu said:
8 years ago
Lets Sachin's age is x years.
And Rahul's age is y years,
Then x=y-7 because Sachin is younger than Rohit by 7 years it implies Sachin age is 7 years less Than Rohit,
In question, ages are in the 7:9.
So x/y=7/9,
9x=7y,
y=9x/7,
From the equation,
x=y-7.
substitute y=9x/7,
x=9x/7-7,
7x=9x-49,
2x=49,
So x=24.5.
So, Sachin's age =24.5 years.
And Rahul's age is y years,
Then x=y-7 because Sachin is younger than Rohit by 7 years it implies Sachin age is 7 years less Than Rohit,
In question, ages are in the 7:9.
So x/y=7/9,
9x=7y,
y=9x/7,
From the equation,
x=y-7.
substitute y=9x/7,
x=9x/7-7,
7x=9x-49,
2x=49,
So x=24.5.
So, Sachin's age =24.5 years.
(1)
Mamta said:
1 decade ago
Sachin = x.
Rahul = x+7.
x/x+7 = 7:9.
9x = 7x+49.
2x = 49.
x = 24.5.
Rahul = x+7.
x/x+7 = 7:9.
9x = 7x+49.
2x = 49.
x = 24.5.
(1)
Ashwini said:
9 years ago
Here they given Sachin is younger than Rahul by 4 years then we need to take X-4 Minus because der said younger so. M does not get actual method can anyone please explain it.
(1)
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