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:
162 comments Page 10 of 17.
Sandeep said:
9 years ago
Here,
A + B = 12110.
A 4/15 = B 2/5.
It can be written as per the rules of the ratio.
4/15 = 4 :15 and 2/5 = 2:5.
As per rules of ratio:
If a : b = c : d then a : b :: c : d in short it equal to ad : bc.
So, here 4 : 15 = 2 : 5.
Then,
4:15 :: 2:5 = 4 * 5 : 15 * 2 = 20 : 30.
2 : 3 So, the ratio between a and b is 2 : 3.
=> a + b = 1210
So, a : b =2 : 3.
b =1210 * 3/5.
=726.
Am I correct? Is there any mistake please tell me.
A + B = 12110.
A 4/15 = B 2/5.
It can be written as per the rules of the ratio.
4/15 = 4 :15 and 2/5 = 2:5.
As per rules of ratio:
If a : b = c : d then a : b :: c : d in short it equal to ad : bc.
So, here 4 : 15 = 2 : 5.
Then,
4:15 :: 2:5 = 4 * 5 : 15 * 2 = 20 : 30.
2 : 3 So, the ratio between a and b is 2 : 3.
=> a + b = 1210
So, a : b =2 : 3.
b =1210 * 3/5.
=726.
Am I correct? Is there any mistake please tell me.
(2)
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.
SATEESH said:
9 years ago
I'm not getting this, Please anyone help me to solve this problem.
Ayush p maheshwari said:
10 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.
Azly said:
10 years ago
Can find answer using simultaneous equations too?
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?
Lemlem said:
10 years ago
Please tell me how can find the ratio 4:15 for A and 2:15 for B?
Pandit ishu said:
10 years ago
Please tell how it work?
Parvathi said:
1 decade ago
Hi please tell me how you got ratio 4/15 for A and 2/15 for B they haven't mention anything in the question.
Justine said:
1 decade ago
Where did you find 1210?
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