How many minutes does it take John to type z words if he types at the rate of x words per minute?
Pick:
A) x/y	B) z/x	C) xy	D) 60x/y	E) y/(60x)
time*rate=job --&gt; time*x=z --&gt; time=z/x.   Answer: z/x.
<result>B</result>
How many minutes does it take John to type z words if he types at the rate of x words per minute?