39. panjang seluruh kerangka = 4 x (Panjang + lebar + tinggi) 4 x (12 + 8 + 6) = 104 cm 1,5 m = 150 150 - 104 = 46cm
40. volum limas = 1/3 x luas alas x tinggi = 1/3 x (25 x 8 ) x 15 = 1/3 x 200 x 15 =1000 volum balok = p x l x t = 25 x 8 x 10 = 2000 volum limas + volum balok = 2000 + 1000 = 3000
x²= 50² - (20+10)²
x²= 50² - 30²
x²= 2500 - 900 = 1600
x = √1600 = 40cm
39. Panjang kawat = 1,5m = 150cm
Kerangka balok = 4(p+l+t)
= 4(12+8+6) = 4 × 26 =104cm
Sisa kawat = 150cm-104cm = 46cm
39. panjang seluruh kerangka = 4 x (Panjang + lebar + tinggi)
4 x (12 + 8 + 6) = 104 cm
1,5 m = 150
150 - 104 = 46cm
40. volum limas = 1/3 x luas alas x tinggi
= 1/3 x (25 x 8 ) x 15
= 1/3 x 200 x 15
=1000
volum balok = p x l x t
= 25 x 8 x 10
= 2000
volum limas + volum balok = 2000 + 1000 = 3000