9) = (15×20×50:2)+(15×20×70)
= 7.500+21.000
= 28.500 cm³
10) L. alas balok = 576:9 = 64 cm²
Rusuk kubus = ³√64 = 4 cm
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9) = (15×20×50:2)+(15×20×70)
= 7.500+21.000
= 28.500 cm³
10) L. alas balok = 576:9 = 64 cm²
Rusuk kubus = ³√64 = 4 cm
V = (1/2x 15x20) x 50 + 70x20x15
V = 7500+ 21000 = 28500cm³
10)
luas alas = V/Tinggi
luas alas = 576/9 = 64cm²
panjang rusuk kubus = ³√64 = 4cm