Question

Акваріум має форму прямокутного паралелепіпеда без кришки. Його бічні стінки і дно - скляні. Визнач площу поверхні скла, якщо довжина акваріума 70 см, ширина 30 см, а висота 50 см. Відповідь:...дм³

Answer 1

Ответ:

121дм2

Пошаговое объяснение:

70см =7дм 30см=3дм 50см=5 дм

S поверхности стекла:7×3+7×5×2+3×5×2=121дм2

а объем

V=7×3×5=105дм3

Answer 2

To determine the surface area of the glass in the aquarium, we need to calculate the area of each of the six sides of the rectangular parallelepiped.

Calculation:

The aquarium has six sides: four sides, a bottom, and a top (which is open since there is no lid). The four sides and the bottom are made of glass.

1. Side 1: Length x Height = 70 cm x 50 cm = 3500 cm² 2. Side 2: Length x Height = 70 cm x 50 cm = 3500 cm² 3. Side 3: Width x Height = 30 cm x 50 cm = 1500 cm² 4. Side 4: Width x Height = 30 cm x 50 cm = 1500 cm² 5. Bottom: Length x Width = 70 cm x 30 cm = 2100 cm²

To find the total surface area, we add up the areas of all six sides:

Total Surface Area = Side 1 + Side 2 + Side 3 + Side 4 + Bottom Total Surface Area = 3500 cm² + 3500 cm² + 1500 cm² + 1500 cm² + 2100 cm²

Calculation Result:

The total surface area of the glass in the aquarium is 12,100 cm².

Please note that the volume of the aquarium was not requested in the question, so we did not calculate it. If you need the volume as well, please let me know.