Aptitude - Simple Interest - Discussion

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

Answer: Option C

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.

Anusha said: (Apr 11, 2012)  
Tell me logic's about this problems.

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.

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