Odpowiedzi

2009-12-15T17:33:43+01:00
H = 1,2m = 12dm
r = 50cm = 5dm
1dm3 = 1l

pole = {pi}r{kwadrat}

{pi} = 3,14

3,14 {razy} 5{kwadrat} = 3,14 {razy} 25 = 78,5

Pole {razy} h = ilosc farby w litrach

78,5 {razy} 12 = 942 dm3 {decymetry sześcienne}

5 {razy} 942 = 4710dm3 = 4710 l

Odp: 4710 l
2009-12-15T17:33:42+01:00
V = π r² * H
v = 3,14 * 0,5² * 1,2 = 0,95

5 * 0,95 = 4,71