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 2 of 7.
Vipul said:
6 years ago
2205=9800*3*R/100.
Is this is correct?
Is this is correct?
Mohd Faiq said:
6 years ago
Which formula you have used to find SI for 3 years = (12005-9800)?
Steve said:
6 years ago
How come 3 here?
Carlo ne said:
6 years ago
Thanks all.
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.
Ayaz said:
6 years ago
@Pramit shome.
Would you explain how?
Would you explain how?
Pramit Shome said:
7 years ago
The answer should be 20%.
Nitishh said:
7 years ago
Nice explanations, Thanks all.
Ramakhil said:
7 years ago
Can any explain why to take 5 years and not 8 years?
(2)
Manju said:
7 years ago
SI for 3 years=12,005-9800=2205.
SI for 1 year=2205/3=735.
SI for 5 year=735*5=3675.
p = total amount - SI.
p = 9800-3675=6125.
The rate of interest = SI *100/p*n,
R = 3675*100/6125*5,
R =12%.
SI for 1 year=2205/3=735.
SI for 5 year=735*5=3675.
p = total amount - SI.
p = 9800-3675=6125.
The rate of interest = SI *100/p*n,
R = 3675*100/6125*5,
R =12%.
(5)
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