Jawaban:

Nomor 1

L∆ = \frac{1}{2}

2

1

x 6 cm x 8 cm

L∆ = 24 cm²

V = L∆ x t

432 cm³ = 24 cm² x t

t = \frac{432cm^2}{24cm^2}

24cm

2

432cm

2

t = 18 cm

Nomor 2

p = 70 m = 700 dm

l = 65 m = 650 dm

t = 30 cm = 3 dm

L. alas = p x l

L. alas = 700 dm x 650 dm

L. alas = 4,55 x 10⁵ dm²

Volume = L. alas x t

Volume = 4,55 x 10⁵ dm² x 3 dm

Volume = 1,365 x 10⁶ dm³

Volume = 1,365 x 10⁶ liter

Jadi volume air tersebut adalah 1,365 x 10⁶ liter atau 1.365.000 liter.

Nomor 3

n = 200

a)

fr = \frac{K}{n}

n

K

fr = \frac{25}{200}

200

25

fr = 0,125

B.)

fr = \frac{K}{n}

n

K

fr = \frac{17}{200}

200

17

fr = 0,085

C.)

fr = \frac{K}{n}

n

K

fr = \frac{65}{200}

200

65

fr = 0,325