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 3 of 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.
Gowthami said:
1 decade ago
Present age of Rahul is x.
Sachin is 7 years older than Rahul so x+7.
Their ratio is 7:9.
x/x+7 = 7/9 cross multiplication is 9x = 7x+49.
9x-7x = 2x. So x = 49/2 = 24.1/2 = 24.5.
So this is my suggestion I hope you all are clear with that.
Sachin is 7 years older than Rahul so x+7.
Their ratio is 7:9.
x/x+7 = 7/9 cross multiplication is 9x = 7x+49.
9x-7x = 2x. So x = 49/2 = 24.1/2 = 24.5.
So this is my suggestion I hope you all are clear with that.
Kinjal said:
1 decade ago
Here Rahul should suppose to b "X".
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.
Ramya devi said:
1 decade ago
Let us assume sachin's age be x and rahul's age be x+7, then.
x/x+7 = 7/9.
9x = 7(x+7).
9x = 7x+49.
9x-7x = 49.
2x = 49.
x = 49/2.
x = 24.5 This is the simplest and easiest to solve.
x/x+7 = 7/9.
9x = 7(x+7).
9x = 7x+49.
9x-7x = 49.
2x = 49.
x = 49/2.
x = 24.5 This is the simplest and easiest to solve.
Affrin said:
1 decade ago
"lesser age" represent --> younger
"older" --> it represent the current age
"older" --> it represent the current age
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
Rupali said:
1 decade ago
if sachin is younger than rahul, this means that his age is less than rahul,i.e. >7
Vanita Sawant said:
1 decade ago
Hey guys i've another method 2 solve d same problem
Let Sachin's age be 'x' years
Therefore, Rahul's age will be x+7 years
x + 7 = 9
x 7
7(x+7)=9x
7x+49=9x
2x=49
x=24.5
Hence Sachin's is 24.5 years old
Let Sachin's age be 'x' years
Therefore, Rahul's age will be x+7 years
x + 7 = 9
x 7
7(x+7)=9x
7x+49=9x
2x=49
x=24.5
Hence Sachin's is 24.5 years old
Mrs pallavi said:
1 decade ago
Hey vanita you are correct good I also solved my problem as like you.
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