What is the power generated by a 45 kg person who walks up a flight of 12 stairs, each 30 cm high, in 12 s? a.13.5 wb.132.3 wc.1,350 wd.13,230 w

The total distance covered by the person is 12 times the height of each stair:


The work done by the person to climb the stairs is equal to the increase in his gravitational potential energy:


And therefore, the power generated by the person in 12 s is the work done divided by the time taken:


So, the correct answer is B.