The length of the parellepiped is 12 m, the width is 3 times the length, and the height in the arithmetic mean is long and wide.

The length of the parellepiped is 12 m, the width is 3 times the length, and the height in the arithmetic mean is long and wide. Find the volume of this parallelepiped.

First, let’s find the width:
1) 12 • 3 = 36 (meters) – width
To find the arithmetic mean of numbers, add the numbers and divide by their number:
2) 12 + 36: 2 = 48: 2 = 24 (meters) – height
To find the volume, you need to multiply all its sides:
3) 12 • 24 • 36 = 10368 (cubic meters) – volume
Answer: 10368 cubic meters of parallelepiped volume.