# Math Help - bounacy

1. ## bounacy

what is the upward force on the bottom of an empty underground storage tank caused by a groundwater depth of 5 feet above the tank bottom? the tank is 8 feet wide and 16 feet long.
help me obi won your my only hope!

2. This is a Physics problem, I must say. According to the Archimedes Principle, any body immersed in some fluid receives a upward force equal to the weight of the moved fluid. See Buoyancy.

Considering the tank to be prismal, it moved a voume of water of $5 x 8 x 16 = 640 ft^3 \simeq 18 m^3 = 18.000 l$ of water. As one liter of water weights aproximately one kg,

$F = 18.000 kgf$

3. ## thanks

thank you Mr Almeida, was hoping i could get it in standard