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20 February, 23:27

If you used only a keyboard to enter data, how many years would it take to fill up the hard drive in a computer that can store 1.6 terabytes (1 terabyte = 1.0 * 1012 bytes) of data? Assume 40-hour work weeks, that you are typing 50 weeks in a year, and that you can type 180 characters per minute, and that one byte is one keyboard character.

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  1. 21 February, 01:24
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    74,074 years.

    Explanation:

    1 tb is equal to 1,000,000,000,000 bytes.

    1.6 terabytes is equal to 1.6 x 1,000,000,000,000 = 1,600,000,000,000‬ bytes.

    40 hour work per week and 50 weeks in a year means the person is typing 40 x 50 = 2,000 hours per year.

    2,000 hours is equal to 2,000 x 60 = 120,000 minutes.

    Characters typed per year, based on speed of 180 characters per minute, is equal to 180 x 120,000 = 21,600,000 characters.

    21,600,000 characters per year = 21,600,000 bytes.

    It would take approximately 1,600,000,000,000 / 21,600,000 = 74,074 years to fill up the hard drive.
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