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Jenna has 20 discs. The figure below shows the dimensions of each disc. Jenna plans to make a cylindrical container to store all the discs in a single column, stacked one on top of the other. What is the smallest volume, to the nearest hundredth, of the container that Jenna should make?

Please help me!

Jenna has 20 discs. The figure below shows the dimensions of each disc. Jenna plans-example-1

1 Answer

3 votes

Answer:

The smallest volume of the container that Jenna should make is 395.64 cm³

Explanation:

Given

Solid Shape: Cylinder

Height = 0.7cm

Diameter = 6 cm.

Number of shapes = 20

Required.

Volume of container to contain all shapes.

First, the volume of one shape needs to be calculated.

The volume of a cylinder is calculated using:

V = πr²h

Where V = volume, r = radius and h = height

From the observation above

h = 0.7 cm

Diameter = 6 cm

Recall that radius = ½Diameter.

So,

r = ½ * 6

r = 3 cm

Substitute these values in the formula above.

V = πr²h becomes

V = 3.14 * 3² * 0.7

V = 3.14 * 9 * 0.7

V = 19.782 cm³

Now that we have the volume of one shape; the volume of a container that'll contains 20 similar shapes is 20 * volume of 1 shape.

In other words,

Volume of container = 20 * 19.782 cm³

Volume = 395.64 cm³

The smallest volume of the container that Jenna should make is 395.64 cm³

User Sergey Shmidt
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