What is a good Rate of Return on investments (ROI) ?

 How one can achieve 15% assured return every year by investing 5 lakhs?
 Can you earn at least Rs. 70  80 k per month with share trading and investing on a capital of Rs.5 lakh?
 How can I invest 3.5 lac for 15 years for getting around 10% return post all broker charges?
Essentially all these questions are variant of one question :What is a good annual return on my investments.
Defining Good Return
What is a good return is something which varies from person to person, for some folks 10 % is a good return for some folks 15 % also seems less, but is their an independent way we can define good returns well let's look at some data , below is 30 year return data from SENSEX , in this time SENSEX returned around
So in little over 30 years sensex grew almost 60 times, thus giving us a CAGR of 14.57% approximately .
So we have one benchmark from the stock market over reasonably long terms of 14.57%
Now lets look at other possible benchmarks, if you put all this money in Fixed deposits your annual rate will be in the range of 77.5% so that's a reasonable risk free benchmark, though there is a tax deduction at source so your actual returns will be far lesser than the benchmark interest rates.
Beyond financial instruments there are nonfinancial instruments or options like investing in real estate which can provide good returns, while we do not have good data on Real estate returns in India.
I hope that this made sense and gives oneself perspective of future returns to expect.