Beach Day by Rodger Bliss
March 2023
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Big Roll of Cloth

I have a roll of cloth one mile long.
I have a machine which cuts this roll into pieces of ten meters each.

How long would it take for the machine to cut the roll if each cut took four seconds?

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3 guesses to Big Roll of Cloth


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  • anant

    640 seconds
    1 mile = 1609.34 meters
    @ ten meters apiece, there will be 161 pieces. To obtain 161 pieces, you need to make 160 cuts. Since each cut takes 4 seconds, total time taken is 640 seconds

  • Daniel Newell

    4 seconds seeing as you are cutting the roll. If you are cutting pieces off of the roll one at a time, it would take 643.736 seconds by my calculations.

  • Anant, you are correct. You are today’s winner.