Question

p=3000,r=5,t=2 ..find compound intrest

Answer 1

Given P = 3000, R = 5%, t = 2.

We know that A = P(1 + r/100)^n

                           = 3000(1 + 5/100)^2

                           = 3000(1 + 1/20)^2

                           = 3000(21/20)^2

                           = 3000 * 21/20 * 21/20

                           = 1323000/400

                           = 3307.5


We know that CI = A - P

                            = 3307.5 - 3000

                            = 307.5


Therefore the compound interest = 307.5 rupees.

Hope this helps!

Answer 2

CI=p(1+r/100)^t. =3000(1+5/100)^2. =3307.5