Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 8)
8.
A lent Rs. 5000 to B for 2 years and Rs. 3000 to C for 4 years on simple interest at the same rate of interest and received Rs. 2200 in all from both of them as interest. The rate of interest per annum is:
Answer: Option
Explanation:
Let the rate be R% p.a.
| Then, |  |
5000 x R x 2 |  |
+ | |
3000 x R x 4 | |
= 2200. |
| 100 | 100 |
100R + 120R = 2200
| R = |
|
2200 | |
= 10. |
| 220 |
Rate = 10%.
Discussion:
22 comments Page 3 of 3.
RaMan said:
4 years ago
In 3000, 1percent in 4yrs is 120.
In 5000, 1percnt in 2 yrs is 100.
Total interest 1 per cent is 220.
220 is 1 percent is then what is the 2200 percent is 10%.
In 5000, 1percnt in 2 yrs is 100.
Total interest 1 per cent is 220.
220 is 1 percent is then what is the 2200 percent is 10%.
(17)
Saurabh Mhatre said:
2 days ago
@All.
Given
Options are;
1. 5%
2. 7%
3. 7 1/8 %
4. 10 %
Now select option 1 that is 5%.
for A = 5000 and time 2 years.
SI For 2 years at 5% per annum is (5000x 2x5)/100 = 500.
For B = 3000 and time 4 years.
SI For 4 years at % per annum is (3000 x 4 x 5)/100 = 600.
The esum of both SI = 1100,
which is half of total SI that is 2200,
So, SI by 5% is 1100 then SI by 10% is 220.0.
So option 4) 10% is correct.
Given
Options are;
1. 5%
2. 7%
3. 7 1/8 %
4. 10 %
Now select option 1 that is 5%.
for A = 5000 and time 2 years.
SI For 2 years at 5% per annum is (5000x 2x5)/100 = 500.
For B = 3000 and time 4 years.
SI For 4 years at % per annum is (3000 x 4 x 5)/100 = 600.
The esum of both SI = 1100,
which is half of total SI that is 2200,
So, SI by 5% is 1100 then SI by 10% is 220.0.
So option 4) 10% is correct.
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