Question

the dimensions of a rectangular metal bar are 6cm x 8cmx 9cm. if the bar has a mass of 4kg. what is the density bar in g/ml and in kg /m3​

Answer 1

Answer:

You ask veery difficult questions and point only 5

Answer 2

The value of density of the bar in g/ml is  9.259×10⁶ g/ml and in kg/m³ is d = 9.259×10³ kg/m³.

Given:

The dimensions of a rectangular metal bar are 6cm x 8cmx 9cm.

Mass, m = 4 kg

To Find:

The density of the bar in g/ml and in kg /m³.

Solution:

We are required to find the density value of the bar in g/ml and in kg /m³.

We know density is given as

Density, d = mass/ volume  -----(1)

The volume of the bar = length×breadth×hieght

mass, m = 4 kg

Volume, v = 6cm x 8cmx 9cm

v = 432 cm³

v = 0.000432 m³

Substitute the value of mass and volume in equation(1) we get

Density, d = 4/0.000432

d = 9259.26 kg/m³

d = 9.259×10³ kg/m³

d = 9259.26×1000×10⁻⁶

d = 9.259×10⁶ g/ml

Therefore, The value of density of the bar in g/ml is  9.259×10⁶ g/ml and in kg/m³ is d = 9.259×10³ kg/m³.

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