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x^2*5X=40//:5
x^2*x=8
x^3=8//∛
x=2
Bok podstawy = a
wysokość h=5a
V=Pp*h
V=a^2*h
40=a^2*5a
40=5a^3
a^3=40/5
a^3=8
a=trzeci pierwiastek z 8
a=2
a=2 cm
h=5a=5*2=10cm
pozdrawiam:)