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Answered

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**Brainliest

How do I find the thickness of rectangular object using only:

sides of 54.2 cm and 12.3 cm

density of 1.3 g/cm^3

mass of 11.4 grams

Sagot :

I believe this is right. Someone feel free to verify my work/methods.

Answer:

W = 0.01315 cm

Explanation:

So, thickness is another way to say "width". You can calculate this by finding the volume of the rectangular object.

Let us take a look at the density formula:

Density = mass/volume

We have the mass AND the density, but not the volume.

1.3 g/cm^3= 11.4 g/ v

Solve for the "v" (volume).

You should get:

v = mass/density

v = 11.4 g/ 1.3 g/cm^3

v = 8.769 cm^3

Now, let us recall the formula for volume.

v = length x width x height

We have two of these.

8.769 cm^3 = 54.2 cm x 12.3 cm x (W)

8.769 cm^3 = 666.66 cm^2 x W

W = 8.769 cm^3 / 666.66 cm^2

W = 0.01315 cm

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