Presumably the question is one related to weight. Weight per linear metre length of bars = 7.85kg/mm2 x area of cross-section of bar (pi x r2, where r is the radius of the bar)
Concrete are used without reinforcement bars on concrete roads.
It depends on the shape you are attempting to compute the volume of. If you are attempting to compute the volume of a box (eight sides, each perpendicular), then it is simply length times width times height.
cube
Reinforcement is anything that provide additional strength to a beam. In a standard beam reinforcement refers to steel bars.
volume=lengthxwidthxheight
Volume and Time
The reinforcement may be in the form of "mesh" or rods. The steel reinforcing rods are colloquially called rebar(reinforcement bars).
It is in the stair-waist from the bottom with min. covering of 15 mm. or equal to the dia. of the main reinforcement (whichever is greater). The main bars are perpendicular to the treads and risers the distribution bars are perpendicular to the main bars and are above it.
Density is mass divided by volume.
-- Measure its mass and volume.-- Divide (mass) by (volume).-- The answer is its density.
50 dia
For reinforcement.