Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 5)
5.
Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 432 as interest at the end of the loan period, what was the rate of interest?
Answer: Option
Explanation:
Let rate = R% and time = R years.
| Then, |  |
1200 x R x R |  |
= 432 |
| 100 |
12R2 = 432
R2 = 36
R = 6.
Video Explanation: https://youtu.be/TjjI4iRkzT0
Discussion:
62 comments Page 3 of 7.
Jagadeesh said:
3 years ago
Here Amount * 100 = principle * time* rate is a simple formula for si.
432*100 = 1200*t*r.
43200/1200 = t*r.
36 = t*r.
Here t=r given;
So r=6 and t=6.
432*100 = 1200*t*r.
43200/1200 = t*r.
36 = t*r.
Here t=r given;
So r=6 and t=6.
(12)
Tejas said:
1 decade ago
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?
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?
Sudhakar said:
6 years ago
@Bhavya Answer is two digits number only why because the first one hr is 34 speed and another hr is also same as the speed 34. So avg is 34 only.
Jagat said:
1 decade ago
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.
Rajan Kumar said:
1 decade ago
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.
so we took t=r we can also write like r=t=r all are same in this question.
KARTHIKEYAN said:
1 year ago
S.I = P * R * T/100.
1200 * R * T/100 = 432.
Let us calculate for one year;
1200 * r * 1 = 432 * 100,
r = 432 * 100/1200 * 1,
r = 6.
1200 * R * T/100 = 432.
Let us calculate for one year;
1200 * r * 1 = 432 * 100,
r = 432 * 100/1200 * 1,
r = 6.
(12)
Kishan said:
1 decade ago
Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest.
Please solve the above sentence.
Please solve the above sentence.
Mhndr said:
1 decade ago
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.
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.
MAHAVEER said:
9 years ago
The answer is D.
Because It is not mentioned in the question that rate of interest and time duration both are equal.
Because It is not mentioned in the question that rate of interest and time duration both are equal.
Anoms said:
9 years ago
Here in question they have mentioned that "interest is as many years of time of end period" so we have to take R = T.
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