In 2008, S. Stephen-Wales from Canada set the world record forhis age group (15-19) for climbing the 320 m vertical height empirestate building stairs. Suppose that he climbed the first 300 m in12 minutes 30 seconds. Estimate the total power his body needed toproduce in climbing the 300m if his body's bio-mechanicalefficiency was 25%. Assume that his mass was 50kg.
