Question

A sum of money becomes 2.25times in 2 years at a certain rate of compound interests per annum.find the rate of interest​

Answer 1

Answer:

The rate of interest = 50% per year

Step-by-step explanation:

P = initial amount

R = rate of interest per cent per year

T = number of years = 2

A = final amount at the end of T years

A = P(1 + R/100)^T

We are given: A = 2.25P

2.25P = P(1 + R/100)^2

2.25 = (1 + R/100)^2

(1 + R/100) = $\sqrt{2.25}$

(1 + R/100) = 1.5                  

(Note: -1.5 is not admissible as R being rate of interest has to be positive)

R/100 = 1.5 - 1

R/100 = 0.5

R = 50

Rate of interest (R) = 50 per cent per year

Answer 2

Answer:

answer is 50% of this question