Answer:
-2f+10+11f
= 9f+10
Step-by-step explanation:
just expand it
Answer:
3
Step-by-step explanation:
8x3=24
24/2=12
12+3=15
15/5=3
The <em>total</em> area of all six faces of the tunnel is square centimeters.
<h2>Procedure - Surface area of a tunnel for a toy train</h2>
The surface area of the solid () used to represent the tunnel for a toy train is the sum of its six faces (two <em>semicircular</em> sections, inner <em>semicircular</em> arc section, outer <em>semicircular</em> arc section, two rectangles).
<h3>Determination of the surface area of the tunnel based on information of the diagram</h3>
We calculate the surface area as following:
The <em>total</em> area of all six faces of the tunnel is square centimeters.
To learn more on surface areas, we kindly invite to check this verified question: brainly.com/question/2835293