Question

At what rate percent per annum compounded annually will a sum of 1000 amount to 1331 in 3 years?
please full solve it
and fast give answer​

Answer 1

Answer:

Principal (P)= Rs. 1000,

Amount(A) = Rs.1331

Rate % = 20 %

Let Required time =t years

According to question,

Note:When interest is compounded half-yearly.

Rate % =202=10%

Time= 2t years

By using formula,

1331=1000(1+10100)2t

13311000=(1110)2t

(1110)3=(1110)2t

By equating both sides

2t=3

t=32 years

t= 112 years

Answer 2

Answer:

10%

Step-by-step explanation:

Given

Principal=1000,n=3 years,A=1331

We know that,A=P(1+r/100)^n

1331=1000(1+r/100)^3

1331/1000=(1+r/100)^3

(11/10)^3{cube}=(1+r/100)^n

(11/10)=(1+r/100)

11/10-1=r/100

11-10/10=r/100

1/10=r/100

1=r/10

r=10

Therefore,the required rate of interest per annum is 10%