Question

A sum of rupees 2,668 lent at simple interest amounts to rupees 4,669 in 5 years. Find the rate of interest per annum.​

Answer 1

Answer:

15%

Step-by-step explanation:

By formula :

SI = P * N * R /100;

here SI = 4669 - 2668 = 2001 as the question says It amounts to 4669.

P = 2668

N =5

R = unknown

By evaluating,

2001 = 2668 * 5 * unknown /20;

unknown = (2001 *20 ) /2668

unknown =15

Answer 2

principal = Rs. 2668

interest = total amount- principal

= 4669 - 2668

= 2001

time = 5 years

We have to find rate of interest

We will use the formula of simple interest

simple interest = ( p × r × t )/100

2001 = ( 2668 × r × 5 )/100

r = 200100/13340

= 15%

Hence, the rate of interest will be 15%