Why Wine Glass Stem is so long?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

What can jump higher than a building?

Why do people go to bed?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

10+10 and 11+11 can give you the same answer.

Explain how?

What does an Island and the letter T have in common?

Rearrange the letters in "new door" to make one word.

Why are all black people so quick ?

What time is it when an elephant sits on a fence?