Page 54 - E-modul Bangun Ruang Sisi Datar

b) Luas Permukaan Kolam Renang

Luas permukaan I = (2 x L.T) + P.T + P.L

= (2 x (4 x 2)) + (20 x 2) + (20 x 4)
= (2 x (8)) + (40) + (80)

= 16 + 40 + 80
2
= 136 m

Luas permukaan II = (2 x luas alas) + (sisi miring alas x tinggi prisma)
1
= (2 x ( x (a + b) x t)) + (sisi miring alas x tinggi prisma)
2
1
= (2 x ( x (2 + 6) x 3)) + (5 x 20)
2
1
= (2 x ( x 8 x 3)) + (100)
2
= 24 + 100

2
= 124 m

Luas permukaan III = (2 x L.T) + P.L

= (2 x (8 x 6)) + (20 x 8)

= (2 x 48) + 160
= 96 + 160
2
= 256 m

Luas permukaan IV = (2 x luas alas) + (sisi miring alas x tinggi prisma)
1
= (2 x ( x (a + b) x t)) + (sisi miring alas x tinggi prisma)
2
1
= (2 x ( x (6 + 14) x 9)) + (10 x 20)
2
1
= (2 x ( x 20 x 9)) + (200)
2
= 180 + 200
2
= 380 m

51