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Grade: 12th pass


A sum put out at 4% compound interest payable half yearly amounts to Rs 13265.10 in 11/2 years. Find the sum.

2 years ago

Answers : (2)

Deepak Kumar Shringi
askIITians Faculty
4403 Points
2 years ago
Dipsruti Mondal
30 Points

The formula for annual compound interest, including principal sum, is:
A = P (1 + r/n) (nt)


A = the future value of the investment/loan, including interest
P = the principal investment amount (the initial deposit or loan amount)
r = the annual interest rate (decimal)
n = the number of times that interest is compounded per year
t = the number of years the money is invested or borrowed for

Now according to your question

A = 13265.10 Rs.

t = 11/2 year

r = 4%

n = 2 (as, half yearly)

Therefore, 13265.10=P(1+4/(2×100))2×11/2

Or, 13265.1= P(51/50)11

Or, P=13265.1(50/51)11

Or, P = 10668.62 (approx.)

Therefore the sum of the amount was Rs. 10668.62 (approx.)



2 years ago
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