The dimensions will be square feet.
30*16 = 480 miles
Thirty meters can be expressed in various dimensions depending on the context. For example, it could be a length of 30 meters, a width of 30 meters, or a height of 30 meters. Additionally, in a three-dimensional space, it could represent the dimensions of a cube with each side measuring 30 meters. Alternatively, it could also refer to a rectangular area, such as 30 meters long and 10 meters wide.
No
15 x 30 x 6 = 2700 cu. ft. 7.48 gal/cft x 2700 cft = 20,200 gallons. Or course, it's unlikely that an actual pool would be a straight sided right prism, of dimensions 15x30x6, so it's also unlikely that an ACTUAL pool with those 'nominal' dimensions would contain that many gallons.