# Aptitude - Simple Interest - Discussion

### Discussion :: Simple Interest - General Questions (Q.No.10)

10.

A man took loan from a bank at the rate of 12% p.a. simple interest. After 3 years he had to pay Rs. 5400 interest only for the period. The principal amount borrowed by him was:

 [A]. Rs. 2000 [B]. Rs. 10,000 [C]. Rs. 15,000 [D]. Rs. 20,000

Explanation:

 Principal = Rs. 100 x 5400 = Rs. 15000. 12 x 3

 Kannan said: (Jan 15, 2011) Can you show me the work out sample for this i couldn't get it.

 Anusha said: (Jan 21, 2011) Can you please explain it clearly

 Srinivas said: (Jan 28, 2011) S.I=P*T*R/100 SIMPLE INTEREST=5400 T=3 R=12 THEREFORE P=S.I*100/T*R =5400*100/12*3 =15000

 Sanna said: (Mar 10, 2011) Let the principal amount be p simple interest=p*n*r/100 so, p*3*12/100=Rs.5400 p*36/100=5400 p=5400*100/36 p=Rs.15000 Thus we can get the answer....

 Naveen said: (Mar 13, 2011) Can anybody expand this formula. SI = PTR/100.

 Nimisha said: (Apr 5, 2011) @Naveen 'p' is principle, 't' is time, 'n' is number of years and 'r' is rate of interest.

 Ashik said: (Jul 30, 2011) p=? r=12% t=3 yrs p*t*r/100=s.i p*3*12/100=5400 p*36=5400*100=540000 p=540000/36 p=15000

 Anand said: (Dec 30, 2011) I=(PRN)/100 Simple formulae.

 Debashree said: (Feb 7, 2013) In 1 year interest is 5400/3=1800rs. 12rs interest in 100 rs principal. Then 1800rs interest for (1800*100)/12=15000rs(answer).

 Srikanth Duppada said: (May 3, 2013) For 1 year 12% then for 3 years 36%(12+12+12)(this is only for S.I not for C.I). Take 100 as principal then 36 rs interest for 100 then, 5400..............?(Principal). (5400/36)x100 = 15000.

 Chandrakant Sinh said: (Sep 8, 2013) One year int is 36 for 100 so total int is 5400 so 5400*100/36 = 15000.

 Asdf said: (Nov 15, 2013) Then what is the formula for compound interest?

 Ganeshgoud said: (Mar 7, 2014) SIMPLE INTEREST = 5400. T = 3. R = 12. P = ? S.I = P*T*R/100. THEREFORE P = S.I*100/T*R. = 5400*100/12*3. = 15000.

 Rajesh said: (Dec 25, 2015) ---> 15000*12% = 1800. ----> 1800*3 = 5400. Answer : 15000.

 Manish said: (Feb 4, 2016) How to come 100 there?

 Shiva Kumar Balla said: (Feb 5, 2016) Actually 12% written as 12/100 right. Then how it's came 100/12 can anybody explain? Thanks.

 Muhammed Afees said: (Apr 4, 2016) 5400/3 = 1800 (one year intrest). Hence principal amount = 1800/.12 = 15000.

 Kota said: (Apr 28, 2016) 36% ----> 5400 then 1% ----> 5400/36 =150. 100%---->x So, x = 150 * 100. =15000.

 Helia said: (Sep 14, 2016) Thanks for all the explanation.

 Ganesh Appu said: (Oct 25, 2016) This case can be approached in an easier way with the help of options. For one year 12 percent interest then for 3 years it would b 36 percent. Therefore (36 percent of ---------= 5400) is the answer. 36 percent of 15000 is 5400 so option c is the answer.

 Ajianth Khedkar said: (Jan 3, 2017) 5400 is a multiply by 100 then, 12 * 3 means rate of interest of 3 years so, 540000/ 36 = 15000. So, Principle amount = 15000.

 Hariharasubramanian said: (Jun 9, 2017) Here, 100 * 5400/12 * 3 = 100 * 150 = 15,000.

 Bindu said: (Apr 28, 2018) Here, 100 * 5400/36 = 15000.

 Boss said: (May 12, 2018) Principal = (100*5400)/(12*3)=540000/36=15000.

 Amod said: (Sep 28, 2019) What does it mean like for a period? Please tell me.

 Zahid Hasan said: (Oct 26, 2020) Every year = 5400/3 = 1800, now 12%=1800, then 100%= 15000.

 Sampson said: (Jun 14, 2021) Why do you always add 100 at the Numerator? Not getting it. Please explain me.