The diameter of a toilet paper roll is 11cm, while the cardboard roll on the inside is 4cm. (Whole thing is 11cm, part without paper is 4cm in middle). Each piece of paper is 12cm by 12cm and the whole roll contains 240 sheets total. How many turns of the toilet paper is there and how thick is this toilet paper?

Anonymous Changed status to publish November 29, 2021
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