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Jawaban:

2. volume =1 / 3 X luas alas X tinggi

= 1 / 3 ( 15 X 10) X 15

= 5 X 10 X 15

= 750

3. volume = 640 cm³

= 1 / 3 ( 1/2 X 12 X 16) X tinggi

= (4 X 8) X tinggi

= t =20 cm³