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:
2 : 5
3 : 5
4 : 5
6 : 7
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:
126 comments Page 12 of 13.

Manimekalai.v said:   1 decade ago
Ganapathy method is good.

Priyabrata Muduli said:   1 decade ago
Sathi's concept is right.

Kunal said:   1 decade ago
Why take third number as 100?

Naveen said:   1 decade ago
Take 10 and 20% more than 10 is 12 and 50% more than 10 is 15 so the ratio is 12:15 which is nothing but 4:5 .

Haseeb Siddiqi said:   1 decade ago
Ramesh's method is good and easy.

Sruthi said:   1 decade ago
Sathi's concept is right.

Sathi said:   1 decade ago
Take A,B,C as three numbers

A is 20% more than C

A=C+20%of C=C+0.2C=1.2C

same way

B=C+50%of(C)=C+0.5C=1.5C

ratio A/B=1.2C/1.5C=4/5

Ans 4/5

Sumit said:   1 decade ago
Let it be of 100. It is most convennience.

SUGANYA.P said:   1 decade ago
I do know understand this concepts please explain.

Sathya said:   1 decade ago
Let 3rd no is x
20%of x=(20/100)*x
50%of x=(50/100)*x
1/5x:1/2x
ans=2:5


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