Guesstimate Example # 5 | The number of words an average eraser can rub off would be?

Q. The number of words an average eraser can rub off would be___?

Assumption:

1) Size of an average eraser is 5cm*2cm*1cm.
2) The eraser is completely used.

Calculation:


After erasing a sheet, the length of the rubber is reduced by 5mm. Assuming that we can write about 500 words on a single sheet of paper.

Length of rubber reduced by 1 word= .0001cm.

Total number of words that can be erased= 5/.0001 =50,000 words



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