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2 answers:
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Answer:
262 square feet of the ramp will be painted red.
Step-by-step explanation:
The lateral surface is surface area of the sides of the ramp without including the top and bottom faces
The ramp shown has three surfaces
The 2 sides are triangles with length 20 and height 8.5
The back is a rectangle shape with length 12 and height 8.5
Step 1: Finding the Area of triangle
The area of the triangle =
The area of the triangle =
The area of the triangle =
The area of the triangle = 85 square feet
Area of 2 triangles = = 170
Step 2: Finding the Area of Rectangle
Area of rectangle =
so,
Area of back rectangle = = 102 square feet
Step 3: Finding the total lateral surface area
Total Lateral Surface Area
= Area of triangle + Area of Rectangle
= 272 square feet
