Aptitude - Ratio and Proportion - Discussion
Discussion Forum : Ratio and Proportion - General Questions (Q.No. 1)
1.
A and B together have Rs. 1210. If 
of A's amount is equal to 
of B's amount, how much amount does B have?
of A's amount is equal to of B's amount, how much amount does B have?
Answer: Option
Explanation:
| 4 | A | = | 2 | B | |
| 15 | 5 |
 A = |
 |
2 | x | 15 |  B |
| 5 | 4 |
| A = |
3 | B |
| 2 |
| |
A | = | 3 |
| B | 2 |
A : B = 3 : 2.
 B's share = Rs. |
|
1210 x | 2 | |
= Rs. 484. |
| 5 |
Discussion:
161 comments Page 11 of 17.
Lemlem said:
10 years ago
Please tell me how can find the ratio 4:15 for A and 2:15 for B?
Rajesh said:
10 years ago
My questions are:
1. If 2\5*1210 = 484 works for B.
Then A should be 4/15*1210. But it doesn't give the answer.
2. Why we are calculating A:B?
1. If 2\5*1210 = 484 works for B.
Then A should be 4/15*1210. But it doesn't give the answer.
2. Why we are calculating A:B?
Azly said:
10 years ago
Can find answer using simultaneous equations too?
Ayush p maheshwari said:
9 years ago
We have to just divide 2/5 from 1210. To prove that they both are not equal that's why they take ratio.
SATEESH said:
9 years ago
I'm not getting this, Please anyone help me to solve this problem.
Athira.Dams said:
9 years ago
A + B = 1210.
B = 1210 - A.
(4/15)A = (2/5)B = (6/15)B.
B = (4/15) * (15/6)A.
= (2/3)A.
A + (2/3)A = 1210.
(3A/3) + (2A/3) = 1210.
5A/3 = 1210.
A =1210 * (3/5).
= 726.
B = 1210 - 726.
=484.
B = 1210 - A.
(4/15)A = (2/5)B = (6/15)B.
B = (4/15) * (15/6)A.
= (2/3)A.
A + (2/3)A = 1210.
(3A/3) + (2A/3) = 1210.
5A/3 = 1210.
A =1210 * (3/5).
= 726.
B = 1210 - 726.
=484.
Pravallika said:
9 years ago
@Sandeep
The ratio a : b is different from that of ad : bc.
2 : 3 is the answer for ad : bc but not a : b.
A(4/15) = B(2/5).
As per the rules of the ratio, it is written as;
4/15 = 4 :15 and 2/5 = 2:5.
Because they didn't mention the ratios of the amounts they had. They mentioned about the relation between those ratios.
A(4/15) = B(2/5) then A : B is 3 : 2.
And amount of B is 3/(3 + 2) * 1210 = 484.
The ratio a : b is different from that of ad : bc.
2 : 3 is the answer for ad : bc but not a : b.
A(4/15) = B(2/5).
As per the rules of the ratio, it is written as;
4/15 = 4 :15 and 2/5 = 2:5.
Because they didn't mention the ratios of the amounts they had. They mentioned about the relation between those ratios.
A(4/15) = B(2/5) then A : B is 3 : 2.
And amount of B is 3/(3 + 2) * 1210 = 484.
Raghuveer said:
9 years ago
The simple way is;
2/5 * 15/4 = 3/2.
A : B = 3 : 2.
5 -----> 1210.
then 2 --------> 1210 * 2/5 = 484.
2/5 * 15/4 = 3/2.
A : B = 3 : 2.
5 -----> 1210.
then 2 --------> 1210 * 2/5 = 484.
Shubham said:
9 years ago
@Sridhar.
Your explanation is helpful. Thank you.
Your explanation is helpful. Thank you.
Raghuveer said:
9 years ago
a/b = 3/2, a:b = 3:2
5 ----> 1210
2 ----> 484
5 ----> 1210
2 ----> 484
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers