Aptitude - Compound Interest - Discussion
Discussion Forum : Compound Interest - General Questions (Q.No. 7)
7.
At what rate of compound interest per annum will a sum of Rs. 1200 become Rs. 1348.32 in 2 years?
Answer: Option
Explanation:
Let the rate be R% p.a.
| Then, 1200 x |  |
1 + | R |  |
2 | = 1348.32 |
| 100 |
 |
|
1 + | R | |
2 | = | 134832 | = | 11236 |
| 100 | 120000 | 10000 |
 |
|
1 + | R | |
2 | = | |
106 | |
2 |
| 100 | 100 |
| 1 + |
R | = | 106 |
| 100 | 100 |
R = 6%
Discussion:
41 comments Page 2 of 5.
Vijay said:
9 years ago
1348.32 is not the C.I.
It is the amount so obviously 1348.32 =1200(1 + r/100)^2,the formula for the amount,I got confused at this. Please help me.
It is the amount so obviously 1348.32 =1200(1 + r/100)^2,the formula for the amount,I got confused at this. Please help me.
(3)
Rosy said:
1 decade ago
1348.32 = 1200(1+R/100)^2.
1.1236 = (1+R/100)^2.
(1.1236)^(1/2) = (1+R/100).
Since, divided half both sides,
1.06 = (1+R/100).
r = 6%.
1.1236 = (1+R/100)^2.
(1.1236)^(1/2) = (1+R/100).
Since, divided half both sides,
1.06 = (1+R/100).
r = 6%.
Rakesh sharma said:
9 years ago
(100 + R) x 1200/100 = 1348.32,
100 + R = 1348.32 x 100/1200,
100 + R = 112.36,
R =12.36 * 6 + 6 + (6x6/100) = 12.36 so ans is 6.
100 + R = 1348.32 x 100/1200,
100 + R = 112.36,
R =12.36 * 6 + 6 + (6x6/100) = 12.36 so ans is 6.
Srivardhani said:
4 weeks ago
1200:
For 1st year: 6% of 1200 = 72 => 1200 + 72 = 1272.
2nd year : 6% of 1272 = 76.32 => 1272 + 76.32 = 1348.32.
For 1st year: 6% of 1200 = 72 => 1200 + 72 = 1272.
2nd year : 6% of 1272 = 76.32 => 1272 + 76.32 = 1348.32.
Mounica said:
1 decade ago
Can any one explain this?
1348.32 is CI, but here they have taken directly at the place of amount?
1348.32 is CI, but here they have taken directly at the place of amount?
Vinoth said:
1 decade ago
Divide numerator and denominater by 100 to take out point. Tahts why 1200 as 120000.
Praveena said:
7 years ago
1+R/100=106/100.
R/100=106/100-1,
R/100=106-100/100,
R/100=6/100,
100R=600,
R=6.
R/100=106/100-1,
R/100=106-100/100,
R/100=6/100,
100R=600,
R=6.
(10)
Saumitr K said:
8 years ago
Can any one explain me how to solve it by percentage change?
I am getting 6.3.
I am getting 6.3.
TKB said:
10 years ago
Can't we just apply the formula P = R/T using 1200 as the principal amount?
Jasika said:
1 decade ago
1348.32 is CI, but here they have taken. Directly at the place of amount. ?
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