Question

at what rate percent per annum will 800 rupees amount to 1000 rupees in 2 years

Answer 1

S.I = pnr/100

1000-800=200

200 = 800x2xr/100

Therefore r=12.5%

Answer 2

hi,
~~


rate =?
principle=800
time=2
interest = 1000-800 = 200
[interest= amount - principle]
amount= 1000

___________________
ACCORDING TO QUESTION
~~~~~~~~~~~~~~~~~~~~~~~~~
PTR/100 = S. interest
800×2×R/100 = 200
8×2 ×R = 200
R = 200/ 8×2
R = 100/8
R = 12.5%