Correct Option: B. 9km Detailed Explanation: To determine the length of the major road in Ruwawa, we need to consider several factors that can influence the measurement of road lengths in geographical studies. Here’s a step-by-step breakdown of how we arrive at the conclusion that the length is approximately 9 km:

1. Understanding Road Measurement:
2. Road lengths can be measured using various methods, including direct measurement on maps, GPS data, or through surveying techniques. In geographical studies, the accuracy of these measurements can vary based on the tools and methods used.
3. Contextual Information:
4. If we have access to maps or data regarding Ruwawa, we can analyze the road layout. Major roads typically connect significant locations, such as towns, cities, or important landmarks. The length of these roads can often be estimated based on their connectivity and the scale of the map used.
5. Comparative Analysis:
6. When presented with multiple-choice options, we can use a process of elimination based on known geographical data or logical reasoning. If we know the general size of Ruwawa and the typical lengths of major roads in similar regions, we can make an educated guess.
7. Evaluating the Options:
8. Option A (7 km): This length might be too short for a major road, especially if Ruwawa is a significant area with a well-developed infrastructure.
9. Option B (9 km): This length is reasonable for a major road, as it allows for connectivity between key areas without being excessively long.
10. Option C (11 km): While this could also be a plausible length, it may be on the higher side for a single major road unless it connects multiple significant points.
11. Option D (13 km): This length seems excessive for a major road in a smaller area like Ruwawa, unless there are unique geographical features that necessitate a longer route.
12. Conclusion:
13. Based on the analysis, option B (9 km) stands out as the most reasonable estimate for the length of the major road in Ruwawa. It balances the need for connectivity with the typical lengths observed in similar geographical contexts.

Why Other Options Are Incorrect:

• Option A (7 km): This length is likely too short for a major road, which typically needs to cover more distance to connect significant locations effectively.
• Option C (11 km): While this could be a valid length, it may be more than what is necessary for a single major road in a smaller area, making it less likely to be the correct answer.
• Option D (13 km): This option is the least likely, as it suggests an unusually long road for a major route in a smaller geographical area, which is not typical unless there are specific geographical constraints.

Revision Summary:

• The length of the major road in Ruwawa is approximately 9 km, making option B the correct choice.
• Road lengths can be estimated using maps, GPS, and geographical context.
• Comparative analysis of options helps in determining the most reasonable estimate.
• Understanding the typical lengths of major roads in similar areas aids in making informed decisions.