A bottle is full of dettol. One-third of it is taken out and then an equal amount of water is poured into the bottle to fill it. This operation is done four times. Find the final ratio of dettol and water in the bottle.
A certain amount invested at a certain rate, compounded annually, grows to an amountin five years, which is a factor of 1.191016 more than to whatit would have grown in two years. Whatis the rate percentage?