Question

At what percentage of annual interest does Rs. 4000 become Rs. 5290/- in 2
years if interest be calculated annually.​

Answer 1

Answer:

Rate of Interest= 16.12410%

Step-by-step explanation:

SI=PRT/100

SI=A-P

=5290-4000

= Rs. 1290

SI=PRT/100

1290=4000*R*2/100

1290=80*R

R=1290/80

R=16.12410%

Answer 2

15 percent

Working:

Given : If Rs 4000 amounts to Rs 5290 in 2 years .

To find : The rate of annual interest.      

Solution :

Using annual interest formula,

Where A is the amount A= Rs.5290

P is the principle P= Rs.4000

hence, I= 5290-4000

=1290

r is the rate

t is the time t= 2 years  

So, rate= I × 100/P × T

= 1290×100/4000×2

=15 percent

Therefore, the rate of annual interest is 15%.

Source: @titli12381 at https://brainly.in/question/18022876