Aperson buys milk of rs. 8.50 per litre and add water to it. he sells the mixture at the same price and earns a profit of 11.11%.find out how much water did he add to each litre of milk

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?