jawab ketiga nya kakak

42. Keliling = (90 + 65) x 2 = 310 m
Biaya = 135.000 x 310 = 41.850.000

43. = (1 cm x 8) + (4 cm x 2) + (1,5 cm x 2)
= 8 + 8 + 3
= 19 cm

44. Luas dalam perbandingan = 3 x 2 = 6 cm²
Panjang kain = 3/6 x 54 = 162/6 = 27 m
Lebar kain = 2/6 x 54 = 108/6 = 18 m

Maaf kalau salah