Aptitude - Compound Interest - Discussion
Discussion Forum : Compound Interest - General Questions (Q.No. 15)
15.
The compound interest on a certain sum for 2 years at 10% per annum is Rs. 525. The simple interest on the same sum for double the time at half the rate percent per annum is:
Answer: Option
Explanation:
Let the sum be Rs. P.
| Then, |  |
P |  |
1 + | 10 |  |
2 | - P |  |
= 525 |
| 100 |
 |
P | |
|
11 | |
2 | - 1 | |
= 525 |
| 10 |
| P = |
|
525 x 100 | |
= 2500. |
| 21 |
Sum = Rs . 2500.
| So, S.I. = Rs. | |
2500 x 5 x 4 | |
= Rs. 500 |
| 100 |
Discussion:
37 comments Page 3 of 4.
Tshering choden said:
9 years ago
Why did we subtract -1 in place of - p? I can't get this step, help me.
Sagar said:
5 years ago
How p becomes 1, We don't know the value of p right? Explain please.
(1)
Sandy said:
1 decade ago
Can anyone elaborate why there is a -P ? I'm unable to understand. !
(1)
Vinayak said:
7 years ago
How get 21 in the denominator? I am not getting. Please explain me.
(1)
Balu said:
1 decade ago
I am not getting why they have taken -p? can any one explain pls..?
Manjeet said:
1 decade ago
Still I am not get how this (-p) is came from? kindly suggest.
Hemant said:
1 decade ago
I am confused that why we are taking -p. Can you explain me ?
Nisha said:
6 years ago
How 1 came in place of P ? Can you guys explain me please.
Kiran said:
9 years ago
Can anyone tell the simple form to get the value of p?
Chetana said:
9 years ago
Because they took p to be common @Tshering.
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