Aptitude - Compound Interest - Discussion

Discussion Forum : Compound Interest - General Questions (Q.No. 1)
1.
A bank offers 5% compound interest calculated on half-yearly basis. A customer deposits Rs. 1600 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is:
Rs. 120
Rs. 121
Rs. 122
Rs. 123
Answer: Option
Explanation:
Amount
= Rs. 1600 x 1 + 5 2 + 1600 x 1 + 5
2 x 100 2 x 100
= Rs. 1600 x 41 x 41 + 1600 x 41
40 40 40
= Rs. 1600 x 41 41 + 1
40 40
= Rs. 1600 x 41 x 81
40 x 40
= Rs. 3321.

C.I. = Rs. (3321 - 3200) = Rs. 121

Discussion:
220 comments Page 15 of 22.

Suhani said:   7 years ago
I am not at all able to understand the whole sum. Please, someone, help me.

Vishal said:   1 decade ago
If compound interest is given and no.of years have to be calculate then?

Anandaganesh said:   9 years ago
Thank you @Amit. Your explanation is simple to understand the concept.

Mzcool said:   1 decade ago
What is the difference between simple interest and compound interest?

Lilly said:   1 year ago
But why they didn't take 2t for next half year? please explain to me.
(19)

Prasad Shetty said:   1 decade ago
Hi Amit, you have explained the problem correctly and good thinking.

Akhila said:   2 decades ago
How did you get 41/40 am not able to get that value please help me.

Dinesh said:   1 decade ago
How did you get 41/40 am not able to get that value please help me.

Arvind uike said:   8 years ago
3321-3200 how 3200 can give here?

Please give the clear solution.

Gurpreet said:   1 decade ago
Because 3200 is the total amount of one year which is principle.


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