# Aptitude - Simple Interest - Discussion

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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?

 [A]. 3% [B]. 4% [C]. 5% [D]. 6% [E]. None of these

Explanation:

S.I. = Rs. (15500 - 12500) = Rs. 3000.

 Rate = 100 x 3000 % = 6% 12500 x 4

 Answer Me said: (Fri, Jun 25, 2010 02:31:57 AM) Can someone please explain why we sub 12500 from 15500 ?

 Priyanka said: (Mon, Nov 29, 2010 10:20:12 AM) @answer me To get amount of S.I. for four years..

 Juhi said: (Mon, Jul 4, 2011 04:31:39 AM) Amount = principal + simple interest. Dats why we subtracted amount and principal to have the simple interest.

 Yeswanth said: (Sat, Jul 30, 2011 09:12:35 PM) Still I deosn't understand why we have to consider SI as sub 1550 from12500.

 Abhishek said: (Mon, Aug 1, 2011 11:05:10 AM) Is it like Amount= P + S.I Amount= P + (P*T*R)/100 ?

 S.Gowthami said: (Fri, Aug 12, 2011 12:33:38 AM) In that question we are having 3 rate values,so we substitue one by one values then we get the corrct values.for example: p=12500 n=4 r=3 or 4 or 5 or 6 If we sub:3 12500*4*3/100=1500 1500+12500=14000,we are not getting the correct amount value then We sub another, 12500*6*4/100=3000 3000+12500=15500, Now we got the correct value.

 Aayush Bhatnagar said: (Tue, Sep 13, 2011 11:03:35 AM) The calculation used to calculate rate gives out 30 as the answer. [(3000 x 100)/(12500 x 4)] = 30. NOT 6. Can anyone throw a light on this?

 Jenson said: (Fri, Sep 23, 2011 09:07:59 PM) 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 ?

 Karuna said: (Wed, Sep 28, 2011 12:19:06 PM) "R" means what?

 Ruturaj said: (Fri, Nov 4, 2011 11:11:03 AM) He calculation used to calculate rate gives out 150 not 6.

 Gayu said: (Sat, Jul 7, 2012 04:55:47 PM) Here, 6 is the correct answer. 15500-12500=3000. Formula: SI=PNR/100. 3000=12500*4*R/100. 3000*100/12500*4=R. 300000/50000=R. R=6%.

 Pandu said: (Fri, Feb 22, 2013 10:18:45 AM) Here SI=PTR/100 So, SI=15500-12500=3000. P=12500, T=4YER, SO 3000=12500*4*R/100, i.e R=3000/500= 6% answer.

 Johny said: (Thu, Apr 25, 2013 06:09:11 PM) Why should we subtract 15500 from 12500?

 Rajesh said: (Fri, May 17, 2013 09:14:04 PM) We have a 12500 amount & after 4 year, we get 15500 amount so total. Profit amount or S.I in 4 Year is 3000. Now use the Formula:. S.I = (P*R*T) /100.

 Hemant said: (Wed, Jun 26, 2013 07:11:40 PM) 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.

 Jyothi said: (Wed, Jul 10, 2013 12:17:35 AM) 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: (Wed, Jul 24, 2013 09:18:40 PM) 6% interest amount for 12500 is 12500/100 *6 =750. It is for 4 years thats why 12500+750+750+750+750 = 15500.

 Arif said: (Wed, Oct 30, 2013 10:48:19 AM) 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%.

 Gyanendra Parihar said: (Fri, Nov 8, 2013 04:22:45 PM) 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%.

 Sana said: (Mon, Jan 13, 2014 02:22:54 PM) Why subtraction take place? principle & amount is equal?

 Nikhil said: (Sun, Sep 28, 2014 08:54:19 PM) Hi. Why we took 12500 as principal?

 Junaid said: (Sat, Dec 6, 2014 01:29:23 PM) 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%.

 Gopal said: (Fri, Jan 16, 2015 06:58:52 PM) Why we take P = 12500 any why not 15500?

 Suyog said: (Sat, Feb 21, 2015 09:01:39 PM) 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.

 Dozie said: (Thu, Jul 9, 2015 02:29:43 AM) S.I per annum = (15500-12500)/4 = 750. Rate = (S.I*100)/(P*T). = (750*100)/(12500*4). = 75000/50000 = 1.5. Since interest is for four years, multiply by 4, thus; 1.5*4 yrs = 6. Therefore are (rate) = 6%.

 Shri said: (Fri, Jul 24, 2015 06:44:09 PM) 4.65*10 = 46.5. 46.5*2 = 93. Hence 20 days.

 Namit Kumar said: (Wed, Aug 19, 2015 01:44:31 PM) Friends its very simple. 15500-12500 = 3000 /4 = 750. 750*100/12500 = 6%.

 Vijayalaxmi said: (Wed, Aug 26, 2015 08:48:48 PM) Here. P = 12500. T = 4 years. Amount = S.I+P. S.I = Amount-P. S.I = 15500-12500 = 3000. R = 100*S.I/P*T = 100*3000/12500*4 = 6%.

 Raji said: (Fri, Dec 25, 2015 11:06:32 AM) 12500*6% = 750. 750*4 = 3000. 12500+3000 = 15500.

 Rajesh said: (Fri, Dec 25, 2015 11:10:48 AM) --> 12500*6% = 750. ---> 750*4 = 3000. ---> 12500+3000 = 15500. Answer: 6%.