Question

mohon dibantu kak no 30,31,32,33,34,35 pliss​

Answer 1

30.

1. luas bangun datar gabungan adalah 78.8cm²

L = (8×6×½) + (3,14×5²)/2

L = 24 + 39,25

L = 63,25cm²

salah

2.keliling bangun tersebut adalah 29,7cm

K = 6+8+(2×3,14×5)/2

K = 14 + 15,7

K = 29,7cm

benar

31. 6/0.15=

60/1.5=

600/15= 40

40 gelas

32. 15×3000 =

45000cm= 450m

450 meter

33. L = ½lingkaran - lingkaran kecil

L = (3,14×10,5×10,5)/2 - (3,14×5,25 ×5,25)

L = 173,0925 - 86,54625

L = 86.54625cm²

86.54625cm²

34.

2⅔ × 1¼ ÷ 1⅕=

8/3 × 5/4 ÷ 6/5=

40/12 ÷ 6/5=

40/12 × 5/6=

200/72 =

100/36=

50/18=

25/9=

2+7/9

2+7/9

35. 40×30×20=

24000 cm³

rusuk balok = √(24000/3)

rusuk balok = √8000

rusuk balok =2√2000

rusuk balok =4√500

rusuk balok = 20√20

rusuk balok = 40√5

40√5cm