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V = π (D²/4) x L
The volume of the 3-D solid is 120 cubic units, assuming that the 3-D solid is in the form of a cuboid (brick-shaped). The volume of a cuboid is the product of its length, width, and height.
D = M/V Density = Mass divided by Volume
Calculate the (diameter of the pipe (D) divide by 2) squared X pi * length and this will give you the volume. eg Volume = (D/2)2 X Pi X Length. (or R2 X Pi X Length) (Use 3.14159265359 as an approximation for Pi.) In practice, 11/14 Times Diameter is used in lieu of (R2 X Pi) as a quick and dirty but near enough approximation.
You need the mass (m) and volume (v) of the object. The density (d) is then given by:d = m / v
mass by its volume (D=M/V)
V = π (D²/4) x L
The volume of the 3-D solid is 120 cubic units, assuming that the 3-D solid is in the form of a cuboid (brick-shaped). The volume of a cuboid is the product of its length, width, and height.
d=m/v density= mass/ volume
The formula for density is d = density m = mass v = volume
The density is the ratio between the mass and volume: d=M/V.
The main two tools are mass and volume D=mass/volume
the answer is 30 times 4= 120yd
density = mass divided by volume d = m / v
D = M/V Density = Mass divided by Volume
the formula is volume = mass/density since d=m/v then dv=m therefore v=m/d
You need to have the volume and the mass to calculate the density