Hi I bought a ipad 2nd hand its asking the id and password plz help

If you're able to contact the person who set the lock, send them this link and tell them to follow its instructions.

If not, you can't activate the device but may be able to get it refunded. Apple won't remove the lock for anyone other than the original owner(assuming they're alive.)

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Find My iPhone Activation Lock: Removing a device from a previous owner’s account - Apple Support

You'll need the previous owner's assistance.