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I was going though one of those aquariums where you can walk through a plastic tube and can see the sea creatures up close without getting wet.
How could I find an approximate thickness of the tube just with my eye and something I can bring, like a flashlight, ruler, protractor, or whatever.
There is no given information.
How could I find an approximate thickness of the tube just with my eye and something I can bring, like a flashlight, ruler, protractor, or whatever.
There is no given information.