Question 103822
We know that amount of words is equal {{{Rate * Time}}}

If Connie types at a rate of {{[20}}} words per minute faster than Katie types
we have:

{{{600 = 20 * Time}}}

{{{Time = 600 / 20 }}} = > {{{Time = 30min}}}

which means that Connie types {{{600}}} words in {{{30}}} minutes.

Now find it for Katie: since Connie can type 600 words in 5 minutes less than it takes Katie, we will have 

{{{Time = 30 + 5}}} = > {{{Time = 35min}}}

now, let find the rate for Katie:

{{{600 = Rate * 35}}}

{{{Rate = 600 / 35 }}}
{{{Rate= 120 / 7 }}}
{{{Rate = 17.14}}}
Katie types {{{17.14)}}} words per minute.