Answer:
(c) 2205 cm³
Explanation:
The volume of the original prism is the product of its dimensions. The volume of one of two identical pieces will be half that.
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prism volume
V = LWH
V = (21 cm)(21 cm)(10 cm) = 4410 cm³
piece volume
Each piece will have a volume that is half that:
V = 4410 cm³ ÷ 2 = 2205 cm³ . . . volume of each part