Question

a) Oblicz wysokość ostrosłupa o polu podstawy 80 cm^2 i objętości 200 cm^3

b) Oblicz pole podstawy ostrosłupa o wysokości 99 cm i objętości 660 cm^3

daje naaaaaaaaaj :) proszę!!!! pilnie na dzisiaj!!!!!!!!!

Answer 1

V=1/3h*Pp

 

a) h=3V/Pp=3*200/80=7,5

b)Pp=3V/h=3*660/99= 20

 

Answer 2

a)

Pp = 80 cm^2

V = 200 cm^3

Mamy

V = (1/3) Pp *h  / * 3

3 V = Pp *h

h = ( 3 V ) : Pp = ( 3* 200 cm^3 ) : 80 cm^2 = 7,5 cm

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b)

h = 99 cm

V = 660 cm^3

V = (1/3) Pp *h

3 V = Pp*h

Pp = ( 3 V)/ h = ( 3*660 cm^3 ) : 99 cm = 1980 cm^3 : 99 cm = 20 cm^2

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