A $3 D$ shape has been opened up to a flat $2 D$ shape and is shown below.

What was the $3 D$ shape initially?

Cuboid

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Rectangle

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Solid Cylinder

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Hollow Cylinder

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Solution

The correct option is D Hollow Cylinder
We are given with a $2 D$ shape:

In this shape, when we roll the rectangle it would form a shape which looks like:

When this shape gets covered by two circles from above and below, it forms a hollow cylinder.

The $3 D$ shape initially was $Hollow Cylinder$ .

Therefore, option (d.) is the correct answer.

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A 3 D shape has been opened up to a flat 2 D shape and is shown below. What was the 3 D shape initially?

A $3 D$ shape has been opened up to a flat $2 D$ shape and is shown below.

What was the $3 D$ shape initially?