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 12 of 14.
Enigma said:
1 decade ago
How can one add a costant n a variable?
dats wrong..!
its simply..
x=20/100*z+z
y=50/100*z +z
if z is taken as the third no.. :)
dats wrong..!
its simply..
x=20/100*z+z
y=50/100*z +z
if z is taken as the third no.. :)
GNANESWAR said:
1 decade ago
Sathi concept is perfect.
Richa said:
1 decade ago
Sathi method is very good.
Nidhi said:
1 decade ago
Ganapathy you are awsome.
ALI said:
1 decade ago
Hey guys plz don't bother!
let us make it simple...
it was said that first number is 20% more than third number
and second number is 50% more than third number..
now,
we assume the third number is "x".
we all know that "x" means "1x" not just "x"
so 20% more and 50% more than third number means
(20%)+(1x) and (50%)+(1x)
=(0.2)+(1x) and (0.5)+(1x)
=1.2x and 1.5x
now
1.2 : 1.5
let us forget the decimal and assume it 12 : 15
now simplify 12 : 15
i.e divide it by 3.
you'll get 4:5
that's it....
let us make it simple...
it was said that first number is 20% more than third number
and second number is 50% more than third number..
now,
we assume the third number is "x".
we all know that "x" means "1x" not just "x"
so 20% more and 50% more than third number means
(20%)+(1x) and (50%)+(1x)
=(0.2)+(1x) and (0.5)+(1x)
=1.2x and 1.5x
now
1.2 : 1.5
let us forget the decimal and assume it 12 : 15
now simplify 12 : 15
i.e divide it by 3.
you'll get 4:5
that's it....
(1)
Kushi said:
1 decade ago
Thanks sathi.
Sandeep said:
1 decade ago
Some one explain why it is 100?
Abhishek said:
1 decade ago
I took x:x+20:x+50
then i assumed x+(x+20)+(x+50)=100
3x+70=100
x=10
hence the ration is 30/60
1/2
where did i go wrong?
then i assumed x+(x+20)+(x+50)=100
3x+70=100
x=10
hence the ration is 30/60
1/2
where did i go wrong?
Manimekalai.v said:
1 decade ago
Ganapathy method is good.
Priyabrata Muduli said:
1 decade ago
Sathi's concept is right.
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