Question

find principal and rate of interest if a certain principal amount to.Rs 2250 in 1 year and to Rs 3750 in 3 years ​

Answer 1

Step-by-step explanation:

let principal be P, rate of interest be r%

si =pnr

2250-P = P×1×r =Pr ---A

3750-P =P×3×r=3Pr ---B

substitute A in B

3750-P= 3×(2250-P)

3750-P = 6750-3p

2P= 6750-3750 =3000

P=1500

substitute value of P in A

2250- 1500 = 1500× r

r=750/1500 = 0.5

r=50%