Question

Ребра прямоугольного паралепипеда, выходящие из одной вершины, имеют длину 14,8 см 7,5см и 12.5см. Найдите для этого паралепипеда: 1) сумму длин всех ребер; 2) площадь поверхности; 3) обьемпомогитееее плиззззззззз(

Answer 1

1)сумму длин всех ребер
4*(14,8+7,5+12,5)=4*34,8=151,2см
2) площадь поверхности
2*(14,8*7,5+14,8*12,5+7,5*12,5)=2*(111+185+93,75)=2*389,75=779,5см²
3) обьем
14,8*7,5*12,5=1387,5см³

Answer 2

Given Information:

The lengths of the edges of a rectangular parallelepiped are as follows: - Edge 1: 14.8 cm - Edge 2: 7.5 cm - Edge 3: 12.5 cm

We need to find the following for this parallelepiped: 1) The sum of the lengths of all edges. 2) The surface area. 3) The volume.

1) Sum of the lengths of all edges:

To find the sum of the lengths of all edges, we simply add the lengths of all three edges together. The sum of the lengths of all edges is 14.8 cm + 7.5 cm + 12.5 cm = 34.8 cm.

2) Surface area:

The surface area of a rectangular parallelepiped can be calculated by adding the areas of all six faces. The formula for the surface area of a rectangular parallelepiped is: 2(ab + bc + ac), where a, b, and c are the lengths of the three edges.

Using the given lengths, we can calculate the surface area as follows: Surface area = 2(14.8 cm * 7.5 cm + 7.5 cm * 12.5 cm + 14.8 cm * 12.5 cm) Surface area = 2(111 cm² + 93.75 cm² + 185 cm²) Surface area = 2(389.75 cm² + 185 cm²) Surface area = 2(574.75 cm²) Surface area = 1149.5 cm²

3) Volume:

The volume of a rectangular parallelepiped can be calculated by multiplying the lengths of all three edges. The formula for the volume of a rectangular parallelepiped is: abc, where a, b, and c are the lengths of the three edges.

Using the given lengths, we can calculate the volume as follows: Volume = 14.8 cm * 7.5 cm * 12.5 cm Volume = 1387.5 cm³

Therefore, for the given rectangular parallelepiped: 1) The sum of the lengths of all edges is 34.8 cm. 2) The surface area is 1149.5 cm². 3) The volume is 1387.5 cm³.