When any ios layer works both of the following devices? router switsh hub

Hub: Layer1 since it act as a media repeater

Switch: Layer2 it switch packets based on MAC Address

Router: Layer3 it Route Packets based on IP Address

If you mean Where each device work here the answer:

Hub >>> Layer1 or Physical Layer

Switch >>> Layer2 or Data Link Layer

Router >>> Layer3 or Network Layer this is typically but you can add module to make router work as switch also

tip: router is very flixable devicd.

Well,  I think your question is a bit unclear. What I got is that your question is about the IOS layer in which hub, swirch and router operate. If that's the question, then the answer is layer one (physical layer).