HardWater Riddle
What's weightless, visible to the naked eye, and when you put it in a barrel of water it will make the barrel lighter in weight?
Riddle
What's weightless, visible to the naked eye, and when you put it in a barrel of water it will make the barrel lighter in weight?
Choose an answer
A.Air
B.A bubble
C.Foam
D.A hole
Hint: It's a 2-word phrase with 5 letters, starting with "A".
Answer
A hole
Why this is the answer
A hole takes up space that would otherwise be filled with heavier water.
This riddle is filed under Planet Riddles and rated Hard.