A 10 inch thick roof.
And a 10inch thick floor.
he has a chair
and a tube of glue.
How does he get in the room
(the room was built around him incase your wondering how he got in!)
A man is in a room with 4 10inch soild steel walls.
Answer: He cuts the chair in half with the saw
(so he has to halfs of the chair)
then he glues the chair back together
(2 halfs make a whole)
then he escapes through the hole