Aptitude - Compound Interest - Discussion
Discussion Forum : Compound Interest - General Questions (Q.No. 7)
7.
At what rate of compound interest per annum will a sum of Rs. 1200 become Rs. 1348.32 in 2 years?
Answer: Option
Explanation:
Let the rate be R% p.a.
| Then, 1200 x |  |
1 + | R |  |
2 | = 1348.32 |
| 100 |
 |
|
1 + | R | |
2 | = | 134832 | = | 11236 |
| 100 | 120000 | 10000 |
 |
|
1 + | R | |
2 | = | |
106 | |
2 |
| 100 | 100 |
| 1 + |
R | = | 106 |
| 100 | 100 |
R = 6%
Discussion:
41 comments Page 2 of 5.
Charu said:
9 years ago
This method will take time because we need to think the square root that number. There is one formula for rate and i.e. 2 * ci - si * 100/si. But in this question how we'll able to find si?
(1)
Aarav said:
7 years ago
Give shortcut to get the answer clearly.
(1)
Raj said:
9 years ago
@Praveen you are right.
Srivardhani said:
4 weeks ago
1200:
For 1st year: 6% of 1200 = 72 => 1200 + 72 = 1272.
2nd year : 6% of 1272 = 76.32 => 1272 + 76.32 = 1348.32.
For 1st year: 6% of 1200 = 72 => 1200 + 72 = 1272.
2nd year : 6% of 1272 = 76.32 => 1272 + 76.32 = 1348.32.
Hrushi said:
8 years ago
I am not getting this, please can anyone explain it for me?
Prerna said:
8 years ago
How we got 106/100?
Sravan said:
8 years ago
The solution is 7, let me tell how check it out,
This is my own formulae.
A+B+AB/100 believe me it works,
take 7+7+7*7/100=14.49,
Total amount in % * 14.49= 12*14.49 =173.88 he asket for 2 years so 173.88*2 = 347.76 so got it so 7% is correct answer.
This is my own formulae.
A+B+AB/100 believe me it works,
take 7+7+7*7/100=14.49,
Total amount in % * 14.49= 12*14.49 =173.88 he asket for 2 years so 173.88*2 = 347.76 so got it so 7% is correct answer.
Linka said:
8 years ago
How to find the root of 11236 in an easyway? Anyone help me out.
Krishna said:
8 years ago
Can you please explain the step how are is 6%?
Saumitr K said:
8 years ago
Can any one explain me how to solve it by percentage change?
I am getting 6.3.
I am getting 6.3.
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