bagusdarmawan78
5.perubahan luas permukaan = 2 x ( 42 x 28 + 42 x 14 + 28 x 14 ) - 2 x ( 21 x 14 + 21 x 7 + 14 x 7 ) = 2 x ( 1176 + 588 + 392 ) - 2 x ( 294 + 147 + 98 ) = 2 x 2157 - 2 x 539 = 4312 - 1078 = 3234 cm. atau 3 per 4. luas setelah diperbesar
a.15
= 6 × ( 15 × 15 )
= 6 × 225
= 1357 cm²
b.24
= 6 × ( 24 × 24 )
= 6 × 576
= 3456 cm²
c.36
= 6 × ( 36 × 36 )
= 6 × 1296
= 7776 cm²
volume =
a.15
S³ = 15 × 15 × 15
S³ = 3375 cm³
b.24
S³ = 24 × 24 × 24
S³ = 13825 cm³
c.36
S³ = 36 × 36 × 36
S³ = 46656 cm³
maap kalau salah........