
BRSD-2
Presentation
•
Mathematics
•
KG - University
•
Hard
Sumiyem Sumiyem
FREE Resource
5 Slides • 0 Questions
1
Replace with sub-header
2
CONTOH SOAL
Diketahui kubus ABCD EFGH , panjang sisi AB = 7 cm Hitung :
a. Panjang Rusuk kubus =
Panjang kawat kubus
b. Luas alas kubus
c. Luas Kubus d. Volume kubus
JAWAB :
AB = s = 7 cm
a.Panjang Rusuk kubus
= panjang kawat kubus
= s x 12
= 7 x 12
= 84 cm
3
b.Luas Alas kubus
= sxs
= s x s
= 7 x 7
= 49 cm2
c. Luas kubus = s x s x 12
= 7 x 7 x 12
= 588 cm2
d. Volume kubus = s x s x s
= 7 x 7 x 7
= 343 cm3
4
CONTOH SOAL :
Diketahui Balok ABCD EFGH dengan
ukuran seperti pada gambar :
Hitunglah :
a. Panjang Rusuk balok
= Panjang kawat balok
b. Luas alas balok
c. Luas balok d. Volume balok
JAWAB :
a.Panjang kawat Balok =
= 4 p + 4 l + 4 t
= 4. 12 + 4.4 + 4.6
= 48 + 16 + 24
= 68 cm
5
b. Luas alas balok =
= p x l
= 12 x 4
= 48 cm2
c. Luas balok =
= 2(p x l ) +2(px t) +2(lxt)
=2(12x 6) +2(12x4)+2(4x6)
= 144 + 96 + 48
= 288 cm2
d. Volume balok =
= p x l x t
= 12 x 4 x 6
= 288 cm3
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