Question

At what percent of the annual interest does Rs 4000 becomes Rs 5290 in 2 years if interest be calculated annually .


options are:

a) 99 percent
b) 84 percent
c) 15 percent
d) 50 percent



also explain please ​

Answer 1

Answer:

I = PTR/100

Final amount Rs 5290

Principal amount is Rs 4000

So, interest, I = Rs 5290-4000 = Rs1290

So, 1290= 4000×2×R/100

which gives R = 129/8 = 16.125

Hence, interest rate is 16.125%

Answer 2

Answer:

c) 15 percent

Step-by-step explanation:

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

To find : The rate of compound interest.      

Solution :

Using compound 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

=15percent

Therefore, The rate of compound interest is 15%.

if you like please make me brainlist