A glass house is in the shape as shown in the figure . calculate total area of glass needed and calculate the volume of the glass house​

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A glass house is in the shape as shown in the figure . calculate total area of glass needed and calculate the volume of the glass house​

A glass house is in the shape as shown in the figure . calculate total area of glass needed and calculate the volume of the glass house​

Jawab:

Total Luas seluruh bangunan = L prisma segitiga + L balok

                                                 = 248 m² + 292 m² = 540 m²

Total Volume seluruh bangunan = V prisma segitiga + V balok

                                                      = 60 m³ + 336 m³ = 396 m³

Penjelasan dengan langkah-langkah:

Bangunan ini adalah gabungan dari prisma segitiga dan balok.

Diketahui :

Prisma segitiga : alas = 5 m

                         tinggi alas = 6 m

                         tinggi prisma = 11 m – 7 m = 4 m

Ditanya : L = ?

              V = ?

L = 2 X Luas alas + Keliling alas + tinggi

  = 2 X (1/2 X 5X6) + (5+5+6) x 4

  = 2 x (15 + 16 x 4)

  = 2 x 124 = 248 m²

Volume = Luas alas X tinggi

             = (1/2 X 5X6) X 4

             = 60 m³

Sekarang kita hitung balok.

Diketahui : p = 8 m

                  l = 6 m

                  t = 7 m

Ditanya : L = ?

              V = ?

L balok = 2 (pl + pt + lt)

             = 2 (8X6 + 8X7 + 6X7)

             = 2 (48+56+42)

             = 2 x 146 = 292 m²

Volume balok = pxlxt

                        = 8 X 6 X 7

                        = 336 m³

Total Luas seluruh bangunan = L prisma segitiga + L balok

                                                 = 248 m² + 292 m² = 540 m²

Total Volume seluruh bangunan = V prisma segitiga + V balok

                                                      = 60 m³ + 336 m³ = 396 m³