Question

The difference between compound interest and simple interest on a certain sum for 2 years at 15% per annum is rs 180. Find the sum.

Answer 1

Answer:

P=180

R=15%

T=2

S.I=P*R*T/100

=180*15*2/100

=54

C.I=amount+S.I

=180+54

=234 ans

Answer 2

let principal be 100

amount = P (1+r)^t

100(1+15/100)^2

100(23/20)^2

100×23×23÷400

132.25

CI = amount-principal

132.25-100

32.25

SI= 100×15×2÷100

30

difference = CI-SI

32.25-30

2.25

principal=100/2.25×180 =8000