Jawaban:

25. C. 384.000 Cm³

26. A. 196,25 cm²

27. A. 12 M

28. A. 250 cm²

29. C. 390 pembeli

30. C. 58 Pembeli

Penjelasan:

25. Volume kubus Panjang Rusuk 80 cm

V = 3/4 x rusuk x rusuk x rusuk

= 3/4 x 80 x 80 x 80

*80 ÷ 4 = 20

= 3 x 20 x 80 x 80

= 60 x 6.400

Volume = 384.000

26. Luas permukaan Tabung :

d = 5 cm

t = 10

L = π x r ( r + t)

= 3,14 x 5 ( 2,5 + 10 )

= 15,7 x 12,5

L = 196,25 cm²

27. volume balok :

V = P x L x T

1.080 = 18 x L x 5

1.080 = 90 x L

L = 1.080 ÷ 90 = 12 M

28.luas kardus

Luas = 2 x ( P x L) + ( p x t ) + ( L x t)

= 2 x ( 5 x 5 ) + ( 5 x 10 ) ( 5 x 10 )

= 2 x ( 25 ) + (50) + (50 )

= 2 x 125

luas = 250 cm²

29. Hari

senin = 20

selasa = 30

Rabu = 80

kamis = 50

Jumat = 90

Sabtu = 80

minggu = 40

_____________+

= Jumlah pengunjung = 390 pembeli

30. senin = 20 + selasa = 30 + Rabu = 80 + kamis = 50 + Jumat = 90 + Sabtu = 80 ÷ 6

=> 350 ÷ 6 = 58,3

jadi, rata rata = 58 Pembeli

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