Question 1023112
Given : P is directly proportional to cube of windspeed S

P ∝ s⌃3
 = >
P = k*s⌃3 , where k is a constant

a)  k = {P/s⌃3}

b) speed s = 20 mi/hr
   Power P = 96W
   k = {96 / 20⌃3} = 96/8000 = 0.012
   k = 0.012

c) s = 30
   k = 0.012
   P = k*s⌃3 = 0.012*30⌃3 = 324
   P = 324 W