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a) 0.05 m
cm = 0.05 x 100 = 5 cm
0.1 m
cm = 0.1 x 100 = 10 cm
23 cm
V = a x b x c
V = 5 cm x 10 cm x 23 cm
V = 1150 cm³
m = 3.22 Kg
m = 3.22 x 1000 = 3220 g
d = m/v
d = 3220 g / 1150 cm³
d = 2.8 g/cm³