Aptitude - Simple Interest - Discussion

Hai friends
Actually reena took sum of Rs.1200 ie P=1200 and paid simple interest of Rs.432
We are asked to find the rate ie R
It is given that, simple interest for as many years as the rate of interest. this line mean that T=R.
Or
you can asuume R & T to some other variable also ie R=T=x

formulato be used is SI=PRT/100
432=1200*R*R/100 (Here i have used T=R)
43200=1200 R square
Rsquare=43200/1200
Rsquare=36
R=6
Hope understand... Goood night

I don't understand how we will we take T=R & what is mean of as many year as the rate of interest give actual mean of this sentence.

My Answer is 3.6%.
1200*3. 6% = 43.2
Ok now many years means 10 years
So 43.2 * 10 years = 432
Please tell me this is right or wrong, if wrong why?

Because rate is equal to year they given in question itself.
so we took t=r we can also write like r=t=r all are same in this question.

Can anyone solve this, by using the following formula,

S.I=P*N*R/100,

where, S.I=Simple Interest,
P=Principal Amount.
N= Period of time.
and, R= Rate of Interest.

Friend, There you can use,

t = r = x.

Then r=t or x,

t = r or x.

Thus, r^2 or t^2 or x^2. Hope now you understand.

Assume 6 as time and rate of interest.

Then 6% of 1200 is 72.

For six years means (72*6) = 432.

Hence our assumption is correct and 6 is the answer.

Here in question they have mentioned that "interest is as many years of time of end period" so we have to take R = T.

Why do we have a 100?

R = (S.I*100/P*T).
S.I = 432;
P = 1200;
T = R;
R = 432*100/1200*R.
R2 = 36.
R = 6.