Puzzles

Puzzle 1

It was a beautiful sunny morning. The air was fresh and a mild wind was blowing against my windscreen. I was driving from Bangaluru to Brindavan Garden. It took me one hour and 30 minutes to complete the journey. After lunch, I returned to Bangaluru. I drove for 90 minutes. How do you explain it.?

Puzzle 2

How many squares are there in this figure?         

                                           

Puzzle 3

What is the value of

`\sqrt{12+\sqrt{12+\sqrt{12+\sqrt{12+}}}}`