Cubic foot (ft³)
Definition: Cubic foot na volume of cube wey side na one foot. E equal about 28.3168 liters.
History/origin: Cubic foot become standard for construction, trade, and utilities as bigger everyday volumes need familiar imperial unit.
Current use: Cubic feet dey used for fridges/freezers capacity, room air flow, natural gas usage, and shipping volume.
Cubic kilometer (km³)
Definition: Cubic kilometer na huge metric volume unit. One 1 km × 1 km × 1 km cube get 1,000,000,000 m³, or 1,000,000,000,000 L.
History/origin: Earth science need readable unit for very big natural volumes, so km³ help for water bodies, ice, rock, magma, and atmosphere-scale quantities.
Current use: km³ dey show for hydrology, climate reports, ocean volume estimates, glacier studies, volcanic eruption data, reservoir capacity, and large-scale geography.