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 5 of 7.
M.L.R.D said:
8 years ago
After 5 years,
P + S.I = 9800 (sum of money amount).
After 8 years,
P + S.I = 12005 (sum of money amount).
P is no change. But S.I change every year. Therefore the sum of money amount will be changed. That's why the difference of the sum of money amount is equal to different of S.I.
P + S.I = 9800 (sum of money amount).
After 8 years,
P + S.I = 12005 (sum of money amount).
P is no change. But S.I change every year. Therefore the sum of money amount will be changed. That's why the difference of the sum of money amount is equal to different of S.I.
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)
Sabu said:
7 years ago
The discussion is very helpful. Thanks.
Aravind amarnath said:
7 years ago
(100*3675)/(6125*5)% Please anyone explain this step.
Fera said:
7 years ago
A radio is sold for RM75 cash. Mak minah bought it by making a down payment of RM20. He paid the balance plus interest charged of RM5 after one month. What was the rate was charged?
Can someone help me solve this?
Can someone help me solve this?
Fera said:
7 years ago
A radio is sold for RM75 cash. Mak Minah bought it by making a down payment of RM20. He paid the balance plus interest charged of RM5 after one month. What was the rate was charged?
Can someone help me to solve this?
Can someone help me to solve this?
Zayia said:
7 years ago
P = SI * 100/(R*T).
Swathi said:
7 years ago
Can anyone explain why they have considered 5 years and not 8 years?
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)
Ramakhil said:
7 years ago
Can any explain why to take 5 years and not 8 years?
(2)
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