Question

at what rate percent per annum will a sum of 3200 amounts to rs. 3872 in two years

Answer 1

principle= 3200
amount=3872
time=2 years
a=p(1+r\100)to the power time
3872=3200(1+r\100)to the power 2
3872\3200= 1+r\100
(40/44)to the power2=(1+r\100)to the power2
power2 is being cancelled
r\100=44\40-1
r\100=4\40
r\5=4\2
r=10%

Answer 2

Answer:

Step-by-step explanation:

principle= 3200

amount=3872

time=2 years

a=p(1+r\100^n

3872=3200(1+r\100)^2

3872\3200= 1+r\100

(40/44)^2=(1+r\100)^2

^2 is being cancelled

r\100=44\40-1

r\100=4\40

r\5=4\2

r=10%