Mrs. Geeta deposited Rs 350 per month in a bank for I year and 3 months under the Recurring Deposit Scheme. If the maturity value of her deposits is Rs 5,565; find the rate of interrest per annum.
P = Rs. 350,
no of months = 15,
rate = r %
Maturity Value = 5565
Maturity Value=P×n+P×n(n+1)2×12×r100
5565=350×15+350×15(15+1)2×12×r100
r=(5565−350×15)×(2×12)×100350×15×16=9%