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b=90cm=9dm
h=2cm=0,2dm
v=abh=15×9×0,2=27dm³=27litrów
odp. dolano 27 litrów wody
Objętośc dolanej wody to
150 x 90 x 2 = 27000 cm sześciennych = 27000 ml = 27 l
150cm = 15dm, 90cm = 9dm, 2cm = 0,2dm
15dm x 9dm x 0,2dm = 27dm3 = 27l
....................pozdrawiam