How much will ₹ 12,000 amount to in 2 years at compound interest, the rates of interest for successive years being 10% and 11% respectively ?

Calculate the amount and the compound interest on ₹ 25,000 for 3 years, the rates of interest for the successive years being 8%, 9% and 10%, compounded annually.

If simple interest on sum of money for 3 years at 8% per annum is ₹ 7,500, find the compound interest on the same sum for the same period at same rate.

Calculate the amount and compound interest on ₹ 16,000 for 1 year at 15% per annum, compounded half yearly.