Question

Answer this question, only if you know... will mark as the brainliest...​

Answer 1

Answer:

let principal be x

amount=9/4*x

Amount=principal (1+R/100)²

9x/4= x(1+R/100)²

(9x/4)/x = (1+R/100)²

9/4 = (1+R/100)²

under root 9/4 = (1+R/100)

3/2 = 1+R/100

3/2 -1 = R/100

1/2 =R/100

1/2*100 =R

50%=R

Answer 2

Given:

Amount = 9/4 times

Time = 2 years

To Find:

Rate of interest p.a

Solution:

Let the principal be = x

Amount = 9/4 × x = 9/4x

Amount = Principal × (1+ r/100)²

= 9x/4 =  x(1+ r/100)²

= (9x/4)/x = (1+ r/100)²

= 9/4 = (1+ r/100)²

= √9/4 = (1+ r/100)

= 3/2 = 1+ r/100

= 3/2 -1 = r/100

= 1/2 = r/100

50 = r

Answer: The rate of interest is 50.