Question

find the amount to be paid if principal is 1200 and simple interest for 3 years is 300​

Answer 1

Compound interest for 2 years=Rs.832

Simple interest for 3 years=Rs.1200

As simple interest for each year remains the same.

So, simple interest for 2 years=1200×32=Rs.800

We know that,

CI2 year−SI2 year=200SI2 year×R=(100)2PR2

832−800=200800×R

32=4×R

R=8%

Again, CI2 year−SI2 year=(100)2PR2

32=1002P×(8)2

32=10000P×64

P=6432×10000=5000

Hence, the principal is Rs.5000.

Answer 2

Answer:

amount to be paid is rupees 1500