56
56 CBM
65
Mathematically it is close to 77 CBM. But in international business it is generally accepted to consider 68-70 CBM for 40 ft HQ containers.
A standard 40-foot shipping container typically has a capacity of about 67 to 76 cubic meters (cbm), depending on the specific type and design of the container. The most common 40-foot container, known as a standard 40' dry container, usually has a volume of approximately 67.7 cbm. If it’s a high-cube container, it can hold around 76.4 cbm.
28
hello
60*40*1=2400 ft**3 of sand
To convert cubic metres to cubic feet, multiply by 35.314667 To convert cubic feet to cubic metres, multiply by 0.028316847
A 20-foot high cube container has a volume of approximately 38 cubic meters (cbm). This is slightly more than the standard 20-foot container, which typically holds about 33 cbm, due to the extra height of the high cube design. The additional space makes it suitable for shipping larger or bulkier items.
According to http://adaptainer.co.uk 562 CFT are in a 10ft container.
40 ft * 21 ft = 840 sq ft = 78.04 sq metres (to 2 dp).
That room size can be estimated 15 ft x 40 ft