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.
Sathish kumar said:
1 decade ago
This is a simplest way. Lets take x be sachin's age x+7 be rahuls age. Then,
x / (x+7) = 7/9.
=> 9x = 7x+49.
=> 2x = 49.
=> x = 24. 5 -----------> correct answer.
x / (x+7) = 7/9.
=> 9x = 7x+49.
=> 2x = 49.
=> x = 24. 5 -----------> correct answer.
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)
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)
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.
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.
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.
Anish said:
1 decade 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
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)
Vinay said:
1 decade ago
How can I do this please show the steps. For the following problems.
1) @Sanjay is now 1/2 as old as his brother then. What is the present age of each boys?
1) @Sanjay is now 1/2 as old as his brother then. What is the present age of each boys?
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)
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