Aptitude - Compound Interest - Discussion
Discussion Forum : Compound Interest - General Questions (Q.No. 11)
11.
Simple interest on a certain sum of money for 3 years at 8% per annum is half the compound interest on Rs. 4000 for 2 years at 10% per annum. The sum placed on simple interest is:
Answer: Option
Explanation:
| C.I. |
|
|||||||||||
|
||||||||||||
| = Rs. 840. |
 Sum = Rs. |
 |
420 x 100 |  |
= Rs. 1750. |
| 3 x 8 |
Discussion:
40 comments Page 2 of 4.
Sowjanyanaidu said:
3 years ago
Ci = p(1+r/100)n-1.
4000(1+10/100)2-1,
4000(11/10)2-1,
840.
In question, they given that half of the ci means 420.
P=100*si/r*t.
P=420*100/3*8,
= 70*25,
= 1750.
4000(1+10/100)2-1,
4000(11/10)2-1,
840.
In question, they given that half of the ci means 420.
P=100*si/r*t.
P=420*100/3*8,
= 70*25,
= 1750.
(2)
Hema said:
6 years ago
Use CI formula to get rs 840 //formula got substituted.
then divide by 2 >>840/2=420 //a said in question.
then 420 = P * 3 * 8/100.
P = 1750.
then divide by 2 >>840/2=420 //a said in question.
then 420 = P * 3 * 8/100.
P = 1750.
Chitra padmanaban said:
1 decade ago
In the question mention the half of the C.I We get C.I=840 so in S.I=420.
So,
S.I = pnr/100.
420 = p.3.8/100 simplify it got the answer.
So,
S.I = pnr/100.
420 = p.3.8/100 simplify it got the answer.
Deepak said:
1 decade ago
@ishan.
You got the interest 4840 at the 4000rs. So the amount you put it in the business is 4000 and got the 4840. I hope you got it.
You got the interest 4840 at the 4000rs. So the amount you put it in the business is 4000 and got the 4840. I hope you got it.
DEEPAK said:
6 years ago
According to me;
CI of 4000 at 10% rate for 2 yr is 840.
It will half as per qn SI = 1/2(CI) = 420,
P = 420*100/(3*8) = 1750.
CI of 4000 at 10% rate for 2 yr is 840.
It will half as per qn SI = 1/2(CI) = 420,
P = 420*100/(3*8) = 1750.
Ajinkya said:
8 years ago
Answer Is wrong.
Let me explain,
CI=40000(1+10/2*100)^2*2 -40000
Because in problem said that compounded half-yearly.
Let me explain,
CI=40000(1+10/2*100)^2*2 -40000
Because in problem said that compounded half-yearly.
Chandan shaw said:
9 years ago
If the C.I on a certain sum for 3 years at 5% be rs 50.44. What will be S.I?
Please help me in short trick.
Please help me in short trick.
Sipun said:
1 decade ago
I donot understand till now why 4000 substact there and after that what is the formula of sum put there.
Rukh said:
1 decade ago
I am not getting till now why 4000 subtract there, in rest of the question we don't deduct it.
Rakesh said:
1 decade ago
If p = 420.
Now 420*3*8/100 = 100.8 after solving I get.
Then how can value is 1750?
Now 420*3*8/100 = 100.8 after solving I get.
Then how can value is 1750?
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