One sheet of newspaper whose thickness of one sheet is 0.1 mm is folded up in halves.
Supposing it can be folded 20 times, how much does thickness become ?
Supposing it can be folded 20 times, how much does thickness become ?
Answer
Solution
Since one sheet will turn into two sheets when folded once and two sheets will turn into 2 × 2 =4 sheets when folded twice, if it is folded 20 times, it will become the number of sheets which multiply two 20 times.
Since it will be set to 1024 when 2 is multiplied 10 times, it comes to 1024 × 1024 = 1048576 sheets by being folded 20 times.
Therefore, thickness of the newspaper folded 20 times is 0.1 mm × 1048576= 104.8576 m.
104.8576 m
Since one sheet will turn into two sheets when folded once and two sheets will turn into 2 × 2 =4 sheets when folded twice, if it is folded 20 times, it will become the number of sheets which multiply two 20 times.
Since it will be set to 1024 when 2 is multiplied 10 times, it comes to 1024 × 1024 = 1048576 sheets by being folded 20 times.
Therefore, thickness of the newspaper folded 20 times is 0.1 mm × 1048576= 104.8576 m.
