The problem reads:

Jika 3 pekerja menyelesaikan 1 kanopi dalam 2 hari, maka 12 pekerja menyelesaikan 2 kanopi dalam waktu...

This translates to: "If 3 workers complete 1 canopy in 2 days, how long will 12 workers take to complete 2 canopies?"

To solve this, let's use the concept of work rates:

1. Work rate for 3 workers:

   • 3 workers complete 1 canopy in 2 days.
   • So, the work rate of 3 workers is $\frac{1 \text{ canopy}}{2 \text{ days}}$.
   • Therefore, the work rate for 1 worker is $\frac{1}{3} \times \frac{1 \text{ canopy}}{2 \text{ days}} = \frac{1 \text{ canopy}}{6 \text{ days}}$.

2. Work rate for 12 workers:

   • The work rate for 12 workers is 12 times the work rate of 1 worker.
   • $12 \times \frac{1 \text{ canopy}}{6 \text{ days}} = \frac{2 \text{ canopies}}{1 \text{ day}}$.

So, 12 workers can complete 2 canopies in 1 day.

Thus, the correct answer is A) 1 hari.

Would you like further clarification or details on any step?

Here are 5 related questions you might find useful:

1. How does the number of workers affect the time taken to complete a task?
2. If 6 workers were assigned the same task, how long would it take to complete 2 canopies?
3. What is the formula for calculating the work rate when the number of workers changes?
4. How would the solution change if 12 workers were assigned to complete 3 canopies?
5. How does the ratio of workers to time scale in this type of problem?

Tip: Always double-check the proportionality of workers to ensure the calculations remain consistent.