how to delete google account from Android

Remove an account from your device

When you remove an account from your device, everything associated with that account is also deleted from your device. This includes email, contacts and settings.

https://support.google.com/android/answer/2840815?hl=en-GB

• click this link and click Account Icon .
• Click manage .
• Click which account you Wanna delete .
• Click Remove .
• Account has been deleted .

Open your device's Settings app Settings app.
Tap Users & accounts.
Tap the account you want to remove and then Remove account.

Add or remove an account
You can add accounts to your Android phone or tablet. When you add an account, information associated with that account automatically syncs with your device. To get apps from the Google Play Store, you'll need an account on your device.