A school starts at 8.20 am and closes at 1.50 pm. Find the duration for which the school remains open?

Answer

To find the duration for which the school remains open from 8:20 AM to 1:50 PM, we can follow these steps:

### Step 1: Break down the time
- The school starts at **8:20 AM** and closes at **1:50 PM**.
- We need to calculate the total time from the start to the end.

### Step 2: Calculate the minutes from 8:20 AM to 9:00 AM
- From **8:20 AM** to **9:00 AM** is **40 minutes**.

### Step 3: Calculate the hours from 9:00 AM to 1:00 PM
- From **9:00 AM** to **1:00 PM** is **4 hours**.

### Step 4: Calculate the minutes from 1:00 PM to 1:50 PM
- From **1:00 PM** to **1:50 PM** is **50 minutes**.

### Step 5: Add all the time together
- Now, we add the time calculated:
- **40 minutes** (from 8:20 AM to 9:00 AM)
- **4 hours** (from 9:00 AM to 1:00 PM)
- **50 minutes** (from 1:00 PM to 1:50 PM)

### Step 6: Combine the minutes
- First, combine the minutes:
- **40 minutes + 50 minutes = 90 minutes**.
- Since **90 minutes** is equal to **1 hour and 30 minutes**, we can convert this.

### Step 7: Add the hours
- Now, add the **4 hours** from Step 3 to the **1 hour** from the **90 minutes**:
- **4 hours + 1 hour = 5 hours**.

### Step 8: Final duration
- Finally, we have:
- **5 hours** and **30 minutes**.

### Conclusion
- Therefore, the school remains open for **5 hours and 30 minutes**.

---