Question

A sum of Money invested at a compound interest
amount to rs 10816
at the end of Second year
and to rs 11248.60 at the end of third year
find the rate of Interests and
Sum Invested​

Answer 1

Answer:

Principal = Rs. 10,000

Rate = 4%

Step-by-step explanation:

New Principal at the third year = Rs 10816

New principal at the fourth year = Rs 11248.60

According to the question:-

S.I = Principal of fourth year - Principal of third year

S.I = 11248.60- 10816 = 432.6

S.I = P*R*T/100

432.6 = 10816*R*1/100

=> 43260/10816 = 4%

So,

Rate = 4%

Let the second Principal = x

So,

10816 -x = x*4*1/100

=> 10816 -x = x/25

=> 10816 = x/25+x

=> 10816 = 26x/25

=> 10,400 = x

Let the original principal = y

10400 -y = y*4*1/100

=> 10400  = 26y/25

=>Rs. 10,000 = x

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