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This problem states that Jamal takes 5 1/4 minutes to plant one tray of seedlings and asks how long it will take to plant 50 trays, with the answer requested in hours and minutes.

### Step-by-Step Solution:

1. **Time for one tray**:  
   \( 5 \frac{1}{4} \text{ minutes} = 5 + \frac{1}{4} = 5.25 \text{ minutes} \).

2. **Time for 50 trays**:  
   If Jamal plants 50 trays, the total time required is:
   \[
   50 \times 5.25 = 262.5 \text{ minutes}.
   \]

3. **Convert minutes to hours and minutes**:
   \[
   262.5 \text{ minutes} = 4 \text{ hours and } 22.5 \text{ minutes}.
   \]
   Since 0.5 minutes equals 30 seconds, the final answer is 4 hours and 22 minutes.

### Final Answer:
Jamal will take **4 hours and 22 minutes** to plant 50 trays of seedlings.

Let me know if you'd like further clarification or details. Here are some related questions you might find helpful:

1. How do you convert fractions of a minute to seconds?
2. If Jamal increased his speed, how would that affect the total time?
3. How would the calculation change if Jamal rested for a minute after every 10 trays?
4. What if he had to plant 100 trays? How much longer would it take?
5. How would the result change if the time per tray varied slightly?

**Tip**: Always convert time units early in multi-step problems for more manageable calculations.

Jamal làm việc ở trung tâm vườn ươm. Anh ấy mất 5 1/4 phút để trồng một khay cây giống. Anh ấy sẽ mất bao lâu để trồng 50 khay cây giống? Viết đáp số của em bằng đơn vị giờ và phút.

Learn how to calculate the total time required for Jamal to plant 50 seedling trays, with each tray taking 5 1/4 minutes. The solution includes multiplication and time conversion to hours and minutes, suitable for students in Grades 5-6.

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