p=w/t=44kwh/40h=1，1kw=1100w
I = p/U = 1100 w/220v = 5A
w = 0.75 * 44 * 1000 * 3600j = 118800000j
W = mgh = rho水*V*g*h
V=W/(ρ水* g * h)= 11880000/(1000 * 10 * 10)= 1188 m3 > 1000 m3
可註滿1000m3的水池。