My yahoo mail inbox contains 60000 mail to delete how can i delete them all? its hard to delete 200 per click?

You can delete them all with just one click in the new mail, click All new Mail at the top of the mail screen, after it loads click More Actions, then click Select all, then Delete. If you are unable to load the new mail, then you will need to do this page by page in the classic mail. Click Options on the mail screen, then go to Results per page, click the number in the box, on the drop down you can now choose up to 200 per page, click Save Changes. Return to and click inbox, scroll to and click Check all, then delete. Then go to the next page. Don't forget the trash, or just leave it and Yahoo will empty it. You can change the number per page any time you want.

When you open your mail box you will find the word " from " before " the first mail and next to this word you will find a small box just check this box and you will select all the mails and you can delete them

Change your Yahoo mail page to All-New Yahoo Mail. With All-new Yahoo mail, you can "mark all" messages contained in your inbox, and then you can choose to "delete" them all at once.