Question

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Answer 1

Principal Amount(p)=₹800
TOTAL amount =₹1000
Simple Intrest (si)=1000-800=₹200

LET RATE(r)=x%
Time(t)=2 years
Using
p×r×t/100=SI
200=800×x×2/100
200=16x
x=200/16
x=25/2%
$x = 12\times \frac{1}{2} \%$
HERE your answer
12 whole 1/2%

Answer 2

Given, principal = 800, Amount = 1000.

We know that SI = A - P

                           = 1000 - 800

                           = 200.

We know that SI = PTR/100

⇒ 200 = (800 * 2 * R)/100

⇒ 20000 = 1600R

⇒ R = 20000/1600

⇒ R = 200/16

⇒ R = 12.5%

Therefore, rate of interest = 12.5%.

Hope it helps!