Calculate the amount and compound interest on
(a) Rs 10800 for 3 years at
per annum compounded annually.
(b) Rs 18000 for
years at 10% per annum compounded annually.
(c) Rs 62500 for
years at 8% per annum compounded half yearly.
(d) Rs 8000 for 1 year at 9% per annum compound half yearly.
(You could use the year by year calculation using SI formula to verify)
(e) Rs 10000 for 1 year at 8% per annum compounded half yearly.
Here is the link for the answer to your query.
http://cbse.meritnation.com/cbse-math-math/comparing-quantities/5/71/ncertsolutions.html