Explanation:
To find Kohan's typing speed per minute, you can divide the total number of words he can type by the number of minutes:
Speed per minute
=
Total words
Total minutes
Speed per minute=
Total minutes
Total words
In this case:
Speed per minute
=
129
words
3
minutes
Speed per minute=
3 minutes
129 words
Speed per minute
=
43
words/minute
Speed per minute=43 words/minute
So, Kohan's typing speed is 43 words per minute.