if Juan takes 10 seconds to run y yards, how many seconds will it take him to run x yards at the same rate?	Pick: A) 11x/y B) 10x/y C) x/11y D) 11/xy E) xy/11
Answer is B.   The rate of running hards: 10 minutes per y hards.   Thus the time for running x hards = x hards * 10 minutes/y hards = 10x/y
<result>B</result>
if Juan takes 10 seconds to run y yards, how many seconds will it take him to run x yards at the same rate?