Answer:
3560.36 Watts
Explanation:
Power, [tex]P=\frac {nΔW}{Δt)[/tex] where P is power, n is the number of skiers, t is time in seconds and Δt is change in time, ΔW is given by mgh where m is mass, g is gravitational constant, h is height
Substituting n for 4 skiers, m for 62.9 Kg, g for 9.81, h for 148 m and t for 1.71*60=102.6 seconds
P=[tex]\frac {4*62.9*9.81*148}{1.71*60}=3560.360702 Watts[/tex]
Average power is approximately 3560.36 Watts