A is twice as good as B as a workman. A takes 30 days less to complete work. How many days they need to do the work together?

🧠 Explanation:

If A is twice as efficient as B and takes 30 days less to complete a task, they can work together in 20 days. This problem involves work-rate calculations, where A’s efficiency allows faster completion. Together, their combined work rate results in 20 days to finish the task. For math students or professionals, understanding such problems enhances problem-solving skills in time management, resource allocation, or project planning, making it a practical application of algebra in real-world scenarios.