Jawaban:

1. volume tabung=π×r² × t

=22/7×14×14×32

=137984/7

=19712 cm³

2. diket:

P = 50 m, L = 20m, t = 1 + 3 = 4 m

Jawab:

V = P × L × T

V = 50 × 20 × 4

V = 4000 m³

3. Diket:

Luas Alas: 3 M²

Kedalaman: 1,2 m

Jawab:

V = Luas X Tinggi

V = 3 X 1,2

V = 3,6 M³

4. dik:

panjang kawat = 24 m = 2400 cm ukuran 15 x 12 x 13

maka :

Rangka = 4 x (p+l+t)

= 4 x (15+12+13) = 4 x 40

= 1600 cm

jadi banyak Rangka yang dapat dibuat = 2.400/160 = 15 buah

5. V kubus = s³= 75³= 421.875

V gayung = 22/7 x 7 x7 x 18= 2.772

bnyk gayung utk mengisi bak = 421.875 2.772 = 152,19 gayung

atau 152 gayung

6. volume tabung : πr² x t. tabung

π = 22:7x3,5.3,5×10

= 385 ML

banyak gelas = 385 : 55 = 7 gelas

7. Luas permukaan kerucut yang berdiameter 12 cm, tinggi 8 cm, dan pendekatan π = 3,14 adalah

= 301,44 cm².

8. V = 1/3 × π × r² × t

= 1/3 × 22/7 × 10,5 × 10,5 × 30

= 22 × 1,5 × 10,5

= 3465 cm³

9. P × L = 50 m

10 × L = 50 m

1 = 5 m

P × T = 30 m

10 × T = 30 m

T = 3 m

P = 10 m, 1 = 5 m, t = 3 m

V = P ×L × T

= 10 × 5 × 3

= 150 m³

10. V kerucut = 1/3 Tr² t

75,36 = 1/3 x 3,14 x 3² x t

75,36 = 3,14 x 3 xt

75,36 = 9,42 x t

t = 8 cm

11. V = 1/3 × π × r² × t

= 1/3 × 22/7 × 10,5 × 10,5 × 30

= 22 × 1,5 × 10,5

= 3465 cm³

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Semoga bermanfaat

By Answer: KimHanNa1