Question

principal= 1080 time = 2.5 rate interest ? interest = 90​

Answer 1

simple interest = principle× rate×time/100

; 90=1080×2.5×rate/100

90×1000/1080×25

9000/108×25

9000/2700

90/27

3.33

; rate is 3.33

Answer 2

Given that:- Principal =$1080$

Time = $2.5$

Interest = $90$

To find :- Rate interest

Now, Simple Interest

$=>\frac{P\times R\times T}{100}$

$=>90=\frac{1080\times2.5\times rate}{100}$

$=>\frac{90\times 1000}{1080}$

$=>\frac{9000}{108} \times25$

$=>\frac{9000}{2700}$

$=>\frac{90}{27}$

 $=>3.33$%

Thus, rate interest is $3.33$%