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1884 = 2 x 3.14 x r x 20
1884 = 125.6 r
r = `1884 : 125.6
r = 15 cm
Volume = πr²t
= 3.14 x 15² x 20
= 14130 cm³
1884=2.3,14.r.20
1884=125,6r
r=15
v.tab=πr^2t
=3,14.15.15.20
=14130 cm^3