Aptitude - Ratio and Proportion - Discussion
Discussion Forum : Ratio and Proportion - General Questions (Q.No. 2)
2.
Two numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is:
Answer: Option
Explanation:
Let the third number be x.
| Then, first number = 120% of x = | 120x | = | 6x |
| 100 | 5 |
| Second number = 150% of x = | 150x | = | 3x |
| 100 | 2 |
 Ratio of first two numbers = |
 |
6x | : | 3x |  |
= 12x : 15x = 4 : 5. |
| 5 | 2 |
Discussion:
134 comments Page 11 of 14.
Hussain Ali said:
1 decade ago
Let A, B, C are three numbers.
A is 20% more than C.
So A become:
A= C+20%of C = C+0.2C = 1.2C.
B become:
B= C+50%of(C)= C+0.5C = 1.5C.
And ratio between A/B is:
1.2C/1.5C = 4/5.
Hence answer is:4/5.
A is 20% more than C.
So A become:
A= C+20%of C = C+0.2C = 1.2C.
B become:
B= C+50%of(C)= C+0.5C = 1.5C.
And ratio between A/B is:
1.2C/1.5C = 4/5.
Hence answer is:4/5.
Ramaniah said:
1 decade ago
Let us know the number is x.
Then 1st number is 1.2x.
Then the 2nd number is 1.5x.
The the ratio of two numbers are 1.2x:15x=> 1.2 :1.5 =>4:5.
Then 1st number is 1.2x.
Then the 2nd number is 1.5x.
The the ratio of two numbers are 1.2x:15x=> 1.2 :1.5 =>4:5.
Sajal Das said:
1 decade ago
Let the 2 Nos are A and B and the 3rd No. is C.
According to the question A is 20% more than C. i.e., A=(1.2)C and B is 50% more than C. i.e., B=(1.5)C.
And so the ratio is {(1.2)C}/{(1.5)C} = 4/5 , i.e., 4:5.
According to the question A is 20% more than C. i.e., A=(1.2)C and B is 50% more than C. i.e., B=(1.5)C.
And so the ratio is {(1.2)C}/{(1.5)C} = 4/5 , i.e., 4:5.
Neethukasi said:
1 decade ago
Ya ramesh's method is more easy.
Bharadwaj said:
1 decade ago
Sathish ratnam was explained very well.
Yash said:
1 decade ago
I understand the method but why we add 100 in 20% and 50%. If we take third no is x so how a variable is added in 20% and 50%. But satish your method is simple and understood to me.
Prashant said:
1 decade ago
20% of 'x' + 'x' (20% more than third number)
=> 120/100x
=> 120/100x
Satish rathnam said:
1 decade ago
ok mr.gitty take 'x' only. u will get 4:5
=>1st number :2nd number
=> 20% more than X : 50% more than X
=> now cancel "more than X" on both sides
=> 20% : 50 %
=> 1.2 : 1.5
=> 4:5
=>1st number :2nd number
=> 20% more than X : 50% more than X
=> now cancel "more than X" on both sides
=> 20% : 50 %
=> 1.2 : 1.5
=> 4:5
Gitty said:
1 decade ago
If you take x as 100 we will get 4:5..agreed. What is the problem in taking x as a variable itself..? Then the answer become 2:5,right..? could anyone please explain ?
Sasa said:
1 decade ago
Ali and ganapathy good work :).
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