kosz na smieci ma ksztalt walca o srednica dna 28 cm i wyskosci 40 cm, oblicz jaka pojemnasc ma ten kosz, przyjmi ze PI = 3.14, wynik zaokraglij do 1 litra
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d=28cm
r=28cm/2=14cm
h=40cm
Pp=πr²
V=3,14*(1,4dm)²*4dm
V=24,61=około 25l
V = 3,14 * 1,4dm*1.4dm*4dm
V = 24,6176dm3
V=25 l