Question

10 The difference between compound interest and simple interest on a certain sum for
3 years at 5% per annum is 780. Find the sum.​

Answer 1

Answer:

4

Step-by-step explanation:

Answer 2

Answer:

GIVEN

TIME=3YEARS

RATE=5%PER ANNUM

CI-SI=780 rs

let the principal to be s

ammount=p (1+r/100)^n

=x (1+5/100)^3

=x (21/20)^3

=x (9261/8000)

CI=A-P

=9261x/8000-x

=9261x-8000x/8000

=1261x/8000

SI=PRT/1OO

= X×5×3/1oo

=3x/20

GIVEN CI-SI=780

1261x/8000-3x/20=780

1261x-1200x/8000=780

61x=780×8000

x=780×8000/61