Find the surface area and volume of a rectangular parallelepiped, the length of which is 15 cm

Find the surface area and volume of a rectangular parallelepiped, the length of which is 15 cm, width is 5 cm less and the height is 2e more than the length.

The surface area of a rectangular parallelepiped is equal to twice the sum of the products of length and height, width and length, width and height.

The volume of a rectangular parallelepiped is the product of its three parameters: length, width and height.

Since the width of this parallelepiped is 5 cm less than its length, which is 15 cm, then the width is 15 cm – 5 cm = 10 cm.The height is 2 times the length and is 2 * 15 cm = 30 cm.

Thus, the surface area is

2 * (15 * 10 + 10 * 30 + 15 * 30) = 1 800 (cm ^ 2);

and the volume is 15 * 10 * 30 = 4 500 (cm ^ 3).