What did he put in the barrel?

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A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it.
Now the barrel weighs less than 100 pounds. What did he put in the barrel?

oil-barrel-puzzle

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  • 5 Answer(s)

    Put a “HOLE” in the barrel, its weight will automatically reduced.

    Sandrew Guru Answered on 12th November 2015.
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    or put a fire in it 😛

    Pratham Jaiswal Scholar Answered on 22nd November 2015.
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    he kept fire or hole.

    mvkiran128 Guru Answered on 22nd November 2015.
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    He removed few gallons of oil and now barrel is filled with AIR+remaining oil. Hence, weighs less.

    satputetushar Curious Answered on 5th January 2016.
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    He puts something into the barrel with a lower density than oil. The oil will spill out of the barrel and the whole contraption weighs less than before. A big block of wood would do the trick.

    Ciaobella2 Curious Answered on 20th November 2016.
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