The fastest typing time is 50 words per min achieved by option B) and this can be determined by using the unitary method.
The following options in which typing time is the fastest are:
A). 320 words in 8 minutes:
Using the unitary method the speed of typing can be determined. If 320 words are typed in 8 minutes then in 1 minute the speed is:
[tex]=\dfrac{320}{8}\times 1[/tex]
= 40 words per min.
B). 600 words in 12 minutes:
Using the unitary method the speed of typing can be determined. If 600 words are typed in 12 minutes then in 1 minute the speed is:
[tex]=\dfrac{600}{12}\times 1[/tex]
= 50 words per min.
C). 350 words in 10 minutes:
Using the unitary method the speed of typing can be determined. If 350 words are typed in 10 minutes then in 1 minute the speed is:
[tex]=\dfrac{350}{10}\times 1[/tex]
= 35 words per min.
D). 225 words in 5 minutes:
Using the unitary method the speed of typing can be determined. If 225 words are typed in 5 minutes then in 1 minute the speed is:
[tex]=\dfrac{225}{5}\times 1[/tex]
= 45 words per min.
Therefore, the fastest typing time is 50 words per min achieved by option B).
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https://brainly.com/question/23423168
