physics question

One of the questions on NextStepTestPrep's Full Length MCAT #2 Physical Sciences Section has got me stumped. It's about uniform circular motion, and in the explanation the formula they give doesn't make sense. As far as I know the formula should be v=2pir^2/T, but instead they have written...

Hi everyone, I answered incorrectly and still don't understand how to figure out the answer, despite TPR's provided reasoning. Please help. Consider a quadruped of roughly the same mass and proportion as the human above (say, a large cat), with roughly the same time of contact of the foot with...