A typist is entering text on a keyboard at the rate of 30 wo

A typist is entering text on a keyboard at the rate of 30 words per minute. If each word is 6 characters long on average, what bandwidth in bits per second between the keyboard and main memory is required to transmit the information? A space is also a character. Assume that each word is followed by one space on average.

Solution

Assuming number of bits/character is 8.

In 1 minute => 30 words

meaning (30 x 6) + 29 characters [29 for spaces]

meaning { (30 x 6) +29 } x 8 bits = 1672 bits

In 1 minute or 60 second it is 1672 bits

In 1 sec it is 27.867 bits

Number of bits being sent per second is 27.867 bits