The amount of Rs. 20, 000 after 2 years, compounded annually with the rate of interest being 10% per annum during the first year and 12% per annum during the second year, would be (in rupees)
Here, For the first year: Principal, p = Rs. 20000; time period, t = 1 year; r = 10%
∴ Amount at the end of first year = p + prt/100 = 20000 + (20000 × 10 × 1)/100 = Rs. 22000
This will be principal amount for the second year, where r = 12%
∴ Amount at the end of second year = p + prt/100 = 22000 + (22000 × 12 × 1)/100 = Rs. 24640