Question

At what rate percent per annum will Rs 4500 gives interest of Rs 1215 in 3year?​

Answer 1

Step-by-step explanation:

Interest = 5715 - 4500 = 1215

i = p×r×t/100

1215 = 4500×r×3/100

r =1215/135

r = 9% ans

hope it would helped you

Answer 2

Answer:

At what rate percent per annum will rs.4500 amount to rs. 5715 in 3 years.

The rate percent per annum is 8.2%.

To find : At what rate percent per annum will Rs.4500 amount to Rs. 5715 in 3 years ?

Solution :

Using amount formula,

A=P(1+\frac{r}{100})^t

Where, A is the amount A=Rs.5715

P is the principal P=Rs.4500

Time t=3 years

r is the interest rate

Substitute the value in the formula,

5715=4500(1+\frac{r}{100})^3

\frac{5715}{4500}=(1+\frac{r}{100})^3

1.27=(1+\frac{r}{100})^3

Taking cube root both side,

\sqrt[3]{1.27}=1+\frac{r}{100}

1.082=1+\frac{r}{100}

1.082-1=\frac{r}{100}

r=0.082\times 100

r=8.2\%

Therefore, the rate percent per annum is 8.2%.

0R.........

At what rate percent per annum will 8000 amount to 9600 in 2 years 6 months

principal amount= rs 4500

compound amount =rs 5715

time= 3 years

Simple interest=(P.A×time× rate)/100

Rs 5715 --Rs 4500=(4500×3×rate)/10 1215×100=13500×rate

rate=1215×100

------------------

13500

=9%