Launch Safari by touching the “Safari” app on your iPad
Select the “Bookmarks” on left corner of browser, it looks like and open book.
Select “History” in the menu that appears
Now see a list of all the websites you have visited, At the bottom of the list your will see the word “Clear”
Select “Clear All History”
To clear the cached you need to close Safari and go to “Settings”
Once opened settings, Scroll down the list on the left side until you find “Safari”
Select the word “Clear History and Website Data” at the bottom of page.
Select “Clear” in the pop up box to clear the cache, cookies and history
Cache cleared then close and open Safari again