Answer:
Ken runs faster.
Explanation:
Explanations are in the attachment. Conversion factors are easier than they sound. They serve only to change units. For example, there are 12 inches in a foot, by definition. This becomes a conversion factor when written as:
(12 in/1 foot)
The really fun thing about conversion factors is that they can be inverted. So we can also write (1 foot/12 inches). The numerator and denominator are, at some level, equal to each other. They are equivalent to "1." That means we can multiply them times anything, no questions asked. You can always multiply by 1. The difference is that the units must change to maintain the original value, in different units.
So if we have a 10 foot pole, we can also say we have a (10 foot)*(12 inches/1 foot) = 120 inch pole. 10 foot and 120 inch poles are equal, just with different units.
The reverse is also true. If the kid up the block brags his pole is 120 inches, you can invert the conversion factor and bring him back down to Earth:
(120 inches)*(1 foot/12 inches) = 10 feet
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Ken runs faster, by the way.