What will be the compound interest at the rate of 5% per annum for 3 years on that principal which in 3 years at the rate of 5% per annum gives Rs. 1200 as simple interest,
Given,
S.I = Rs.1200
Rate of simple interest = 5%
time = 3 years
Let principal = Rs. P
so, by formula
=
=
Hence,
Principal = Rs.8000
now,
Rate of compound interest = 5%
Time = 3 years
so,
compound interest =