The population of a city increases by 4% of what it had been at the beginning of each year. If the population in 1997 had been 6760000, find the population of the city in (i) 1999 (ii) 1995.

12 A sum of money amounts to Rs. 11910.16 in years at 12% per annum interest being compounded semi annually. Find the sum. 13 The population of a village is 50000. It increases by 5% every year. Find the population at the end of 2 years. 15 Find the compound interest on Rs. 6400 for 2 years compounded annually at % per annum. 16 Find the compound interest on Rs. 15625 for years at 8% per annum when compounded half-yearly.