Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 9)
9.
A sum of Rs. 725 is lent in the beginning of a year at a certain rate of interest. After 8 months, a sum of Rs. 362.50 more is lent but at the rate twice the former. At the end of the year, Rs. 33.50 is earned as interest from both the loans. What was the original rate of interest?
Answer: Option
Explanation:
Let the original rate be R%. Then, new rate = (2R)%.
Note:
Here, original rate is for 1 year(s); the new rate is for only 4 months i.e. 
year(s).
 |
 |
725 x R x 1 |  |
+ | |
362.50 x 2R x 1 | |
= 33.50 |
| 100 | 100 x 3 |
(2175 + 725) R = 33.50 x 100 x 3
(2175 + 725) R = 10050
(2900)R = 10050
| R = |
10050 | = 3.46 |
| 2900 |
Original rate = 3.46%
Discussion:
97 comments Page 9 of 10.
Laxmi kalouni said:
6 years ago
How 2175? Why multiplied by 3.
Please someone explain.
Please someone explain.
Sonu said:
1 decade ago
Hello sir,
Please let me know the right answer please.
Please let me know the right answer please.
G K said:
9 years ago
How it comes 2175 + 725 * 3. Where does 3 come from?
Abhi said:
1 decade ago
Ya you should calculate for 8 months and 4 months.
Abhiruchi said:
1 decade ago
How
725 x R x 1
-------------
100
become 2175
725 x R x 1
-------------
100
become 2175
Maya said:
9 years ago
I agree @Supriya.
I too get the answer as 4.5%.
I too get the answer as 4.5%.
Shibat sunwar said:
7 years ago
The Ans is 2.31.
Second principle is 725+362.5.
Second principle is 725+362.5.
GARIMA said:
8 years ago
Why multiplying it with 1/3?
Please explain.
Please explain.
Agnes said:
1 decade ago
Please why did you multiply 33.50*100*3?
Kajal singh said:
8 years ago
Thank you everyone for explaining it.
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