Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 11)
11.
A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is:
Answer: Option
Explanation:
S.I. for 3 years = Rs. (12005 - 9800) = Rs. 2205.
| S.I. for 5 years = Rs. |  |
2205 | x 5 |  |
= Rs. 3675 |
| 3 |
Principal = Rs. (9800 - 3675) = Rs. 6125.
| Hence, rate = | |
100 x 3675 | % |
= 12% |
| 6125 x 5 |
Video Explanation: https://youtu.be/UYwiBCRN39s
Discussion:
68 comments Page 4 of 7.
Hemanth said:
1 decade ago
In the question given only amount. But when we subtract 8 years amount to 5 years amount we get S.I of 3 years.
(1)
Ravi said:
1 decade ago
No @Bhuvana,
Its not working for all, its depend upon the problem all are our mind calculation.
Its not working for all, its depend upon the problem all are our mind calculation.
Mani said:
9 years ago
Sir, why you have done (2205/3) * 5?
I didn't understand that step. Please explain me.
I didn't understand that step. Please explain me.
Zaid said:
6 years ago
How will we calculate it with the basic SI formula?
SI = P*T*R/100.
Please explain.
SI = P*T*R/100.
Please explain.
Ramachandran said:
10 years ago
I didn't understand the last step.
Hence, rate = 100 x 3675% = 12%.
6125 x 5.
Hence, rate = 100 x 3675% = 12%.
6125 x 5.
Guddu said:
10 years ago
Why difference between amount of two different years is S.I rather than amount?
Rahul kp said:
5 years ago
@Annu.
The Simple Interest remains same whether it is for 1 year or 5 years.
The Simple Interest remains same whether it is for 1 year or 5 years.
Harsha said:
4 years ago
Why we should divide 2205 with 3 & multiply with 5? Please explain this step.
(1)
Tommy said:
4 years ago
@Harsha.
Because we found 2205 for 3 years and now we find it for 5 years.
Because we found 2205 for 3 years and now we find it for 5 years.
(2)
Rakshith said:
7 years ago
Hi guys,
Can anybody explain me why are we taking (2205/3)*5?
Please.
Can anybody explain me why are we taking (2205/3)*5?
Please.
(1)
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