Problem 2 A civil engineer is designing a storm gutter for managing water flow. She needs to determine the total concrete needed to create the gutter by first calculating the cross-sectional area of the gutter. Use the information from the diagram to determine the cross-sectional area of the gutter. **Note, for this problem showing your mathematical work with short justifications is sufficient for explaining your thinking.

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**Problem 2**

A civil engineer is designing a storm gutter for managing water flow. She needs to determine the total concrete needed to create the gutter by first calculating the cross-sectional area of the gutter. Use the information from the diagram to determine the cross-sectional area of the gutter.

**Note**, for this problem, showing your mathematical work with short justifications is sufficient for explaining your thinking.

**Diagram Explanation:**

The diagram shows a cross-sectional view of a semicircular gutter. The diameter of the semicircle is 10 feet. There are two parallel lines on either side of the gutter that extend horizontally by 1 foot. The depth of the gutter is labeled as 7.5 feet. The point P is marked on the right-hand side, one foot from the edge of the semicircle, at a horizontal distance from the center. The shaded area within the semicircle indicates where the concrete will be placed. 

To solve the problem, calculate the area of the semicircle using the formula for the area of a circle (\(A = \pi r^2\)), and then halve it since it's a semicircle. Remember to consider the additional material around the curve for determining the total area.
Transcribed Image Text:**Problem 2** A civil engineer is designing a storm gutter for managing water flow. She needs to determine the total concrete needed to create the gutter by first calculating the cross-sectional area of the gutter. Use the information from the diagram to determine the cross-sectional area of the gutter. **Note**, for this problem, showing your mathematical work with short justifications is sufficient for explaining your thinking. **Diagram Explanation:** The diagram shows a cross-sectional view of a semicircular gutter. The diameter of the semicircle is 10 feet. There are two parallel lines on either side of the gutter that extend horizontally by 1 foot. The depth of the gutter is labeled as 7.5 feet. The point P is marked on the right-hand side, one foot from the edge of the semicircle, at a horizontal distance from the center. The shaded area within the semicircle indicates where the concrete will be placed. To solve the problem, calculate the area of the semicircle using the formula for the area of a circle (\(A = \pi r^2\)), and then halve it since it's a semicircle. Remember to consider the additional material around the curve for determining the total area.
The image depicts a semicircular structural diagram of a concrete-lined channel or basin. Here are the details:

- The structure consists of a semicircle with a total span of 20 feet from one side to the other along the horizontal diameter.
- The horizontal top section is labeled with a distance of 1 foot from the edge of the structure to the outer boundary of the concrete cross-section.
- The center of the semicircle is marked by a point labeled "P," which is equidistant from both ends, showing two 10-foot segments meeting at the center point.
- The vertical span from the topmost part of the semicircle to the lowest point is noted as 7.5 feet.
- The inner radius of the concrete section is labeled with a vertical distance of 4 feet from the top horizontal line to a dashed line inside the semicircle, possibly indicating the water level.
- There is a labeled section indicating a "Concrete Cross-Sectional Area," depicting the thickness and coverage of the concrete material forming the structure.

This diagram is useful for understanding the geometric layout and dimensions of the channel, as well as the distribution of materials such as concrete within the structure.
Transcribed Image Text:The image depicts a semicircular structural diagram of a concrete-lined channel or basin. Here are the details: - The structure consists of a semicircle with a total span of 20 feet from one side to the other along the horizontal diameter. - The horizontal top section is labeled with a distance of 1 foot from the edge of the structure to the outer boundary of the concrete cross-section. - The center of the semicircle is marked by a point labeled "P," which is equidistant from both ends, showing two 10-foot segments meeting at the center point. - The vertical span from the topmost part of the semicircle to the lowest point is noted as 7.5 feet. - The inner radius of the concrete section is labeled with a vertical distance of 4 feet from the top horizontal line to a dashed line inside the semicircle, possibly indicating the water level. - There is a labeled section indicating a "Concrete Cross-Sectional Area," depicting the thickness and coverage of the concrete material forming the structure. This diagram is useful for understanding the geometric layout and dimensions of the channel, as well as the distribution of materials such as concrete within the structure.
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