why on earth meaning in Hindi

Examples

1. Why on earth she decided to kill herself is still a mystery.
2. Why on earth would the president ever want to speak to him?
3. So why on Earth had it vanished from all lists of programmes?
4. Why on Earth would we allow such a person back on Wikipedia?
5. So why on earth would there have to be any additional recognition?
6. Why on earth did my kid ask me all of that crap?
7. Why on earth did Nader think he'd have anything worthwhile to contribute?
8. Why on earth would anyone think that I have something against Kannadigas?
9. I wonder why on earth anyone would want to be a coach.
10. Why on earth are the single years and centuries blued out?