Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 6)
6.
A sum of Rs. 12,500 amounts to Rs. 15,500 in 4 years at the rate of simple interest. What is the rate of interest?
Answer: Option
Explanation:
S.I. = Rs. (15500 - 12500) = Rs. 3000.
| Rate = |  |
100 x 3000 |  % |
= 6% |
| 12500 x 4 |
Video Explanation: https://youtu.be/SIcQu1HOmOk
Discussion:
51 comments Page 5 of 6.
Hemant said:
1 decade ago
A boy saves Rs.4.65 daily. Find the least number of days in which he will be able to save an exact number of rupees.
Can anyone get me answer for this ?
Its 20 days.
Can anyone get me answer for this ?
Its 20 days.
Jyothi said:
1 decade ago
In question I unable to identify which is amount and which is principal please help me. What is the difference b/w amount and principal?
Suvarna said:
1 decade ago
6% interest amount for 12500 is 12500/100 *6 =750.
It is for 4 years thats why 12500+750+750+750+750 = 15500.
It is for 4 years thats why 12500+750+750+750+750 = 15500.
Arif said:
1 decade ago
Simple interest = 15, 500-12, 500 = 3000.
So we compare with options which is given:
Simple interest = P*t*r/100;
3000 = 12500*4*?/100;
3000 = 125*4*3.
3000 = 1500 //not equal,then multiply by 2.
3000 = 1500*2.
3000 = 3000.
It means first we take 3% of rate we get 1500 simple interest ,then multiply by 2 means that multiply by 2 with 3% of rate that is 6%.
So, the answer is 6%.
So we compare with options which is given:
Simple interest = P*t*r/100;
3000 = 12500*4*?/100;
3000 = 125*4*3.
3000 = 1500 //not equal,then multiply by 2.
3000 = 1500*2.
3000 = 3000.
It means first we take 3% of rate we get 1500 simple interest ,then multiply by 2 means that multiply by 2 with 3% of rate that is 6%.
So, the answer is 6%.
Gyanendra parihar said:
1 decade ago
Total amount after 4 year is 15500 and before including interest amount is 12500 thus it is clear the interest is.
15500-12500 = 3000.
If 3000 is 4 year interest than what should be one year interest.
3000/4 = 750.
Now,
12500 is 100 percent than 750 is how many percent of 12500.
(750X12500) /100 = 6%.
15500-12500 = 3000.
If 3000 is 4 year interest than what should be one year interest.
3000/4 = 750.
Now,
12500 is 100 percent than 750 is how many percent of 12500.
(750X12500) /100 = 6%.
Sana said:
1 decade ago
Why subtraction take place? principle & amount is equal?
Nikhil said:
1 decade ago
Hi. Why we took 12500 as principal?
Junaid said:
1 decade ago
By using the formula:
I = P R T/100.
I = 15, 500-12, 500 = 3000.
3000 = 12, 500*R*4/100.
3000*100 = 12, 500*4 R.
300000 = 50000 R.
R = 300000/50000.
R = 6%.
I = P R T/100.
I = 15, 500-12, 500 = 3000.
3000 = 12, 500*R*4/100.
3000*100 = 12, 500*4 R.
300000 = 50000 R.
R = 300000/50000.
R = 6%.
Gopal said:
1 decade ago
Why we take P = 12500 any why not 15500?
Suyog said:
1 decade ago
When we do following steps:
3000*100/12500*4=96.
We get 96 as a answer, then how 6% is your answer?
Just explain me in detail.
3000*100/12500*4=96.
We get 96 as a answer, then how 6% is your answer?
Just explain me in detail.
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