Question

if rate of compound interest in 1st year 2nd year and 3rd year 10% 20% 30% PA interest earned on 2nd RS 13200 find the interest earned on 3rd year?

Answer 1

Let the principal be P

Interest earned for 2nd year
=Rs.13200

i.e Pnr/100 = 13200

P×1×20/100 = 13200

P /5 = 13200

P = Rs. 66000


3rd year interest

= Pnr/100

= 66000×1×30/100

= 660×30

= Rs.19800

I hope this answer helps you