# Aptitude - Simple Interest - Discussion

Discussion Forum : 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:
Rs. 2000
Rs. 10,000
Rs. 15,000
Rs. 20,000
Explanation:

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

Discussion:
31 comments Page 1 of 4.

Void said:   7 months ago
12% for 3yr = 36% = 5400.
P = 100%.
=>5400 * 100/36 = 15000.
(2)

AKATUKUNDA said:   9 months ago
Interest= principal * rate * time.
5400 = principal * 12/100 * 3.
5400 = principal * 36/100.
5400 * 100 = principal * 36,
540000= 36 principal.
540000/36 = principal.
15000 = principal.
(2)

David said:   2 years ago
S.I = PRT,
5400 = P * 12 * 3/100,
540,000 = 36P,
540,000/36,
= 15,000.
(5)

Sampson said:   3 years ago
Why do you always add 100 at the Numerator?

Not getting it. Please explain me.
(4)

Zahid Hasan said:   4 years ago
Every year = 5400/3 = 1800, now 12%=1800, then 100%= 15000.
(2)

Amod said:   5 years ago
What does it mean like for a period? Please tell me.

Boss said:   6 years ago
Principal = (100*5400)/(12*3)=540000/36=15000.

Bindu said:   6 years ago
Here, 100 * 5400/36 = 15000.

Hariharasubramanian said:   7 years ago
Here, 100 * 5400/12 * 3 = 100 * 150 = 15,000.
(3)

Ajianth khedkar said:   8 years ago
5400 is a multiply by 100 then,
12 * 3 means rate of interest of 3 years so,
540000/ 36 = 15000.
So,
Principle amount = 15000.
(1)