Question

Marius and his dad built in the shape of triangular prism open on the top and bottom. How many square inches of canvas did marius and his dad use to make the lamp?
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Answer 1

Given :  Marius and his dad built in the shape of triangular prism open on the top and bottom.

To Find : How many square inches of canvas did Marius and his dad use to make the lamp

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Solution:

Open at top  and bottom

Hence canvas   used to make the lamp  = Surface area of rectangles

Each rectangle is of size  18  inches x  22 inches

Total Area of canvas required = 3 * 18 * 22

= 1188 sq inches

Marius and his dad use to make the lamp  = 1188 sq  inches of canvas

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