Sure! Let’s solve each of the three word problems step by step, explaining the reasoning clearly.
---
Problem 1:
> Trains arrived every 45 minutes. The first train arrived at 6:15 in the morning. At what time will the next train arrive?
✔ Solution:
We start at
6:15 AM and add
45 minutes.
- 6:15 + 45 minutes = 7:00 AM
Answer: 7:00 AM
🔹 *Explanation:* Since trains come every 45 minutes, we simply add 45 minutes to the arrival time of the first train. 15 minutes gets us to 6:30, and another 30 minutes gets us to 7:00.
---
Problem 2:
> A train was scheduled to arrive at the station at ten to eight in the morning, but it didn’t arrive until ten after eight. How long was the delay?
✔ Solution:
First, convert the times to standard format:
- “Ten to eight” =
7:50 AM
- “Ten after eight” =
8:10 AM
Now, find the difference between 8:10 and 7:50.
- From 7:50 to 8:00 is
10 minutes
- From 8:00 to 8:10 is
10 minutes
- Total delay = 10 + 10 =
20 minutes
Answer: 20 minutes
🔹 *Explanation:* We calculate how much later the train arrived than its scheduled time. Counting forward from 7:50 to 8:10 gives us a 20-minute delay.
---
Problem 3:
> A train arrived at 11:30 in the morning after a 90-minute journey from its last stop. When did it leave its last stop?
✔ Solution:
We need to subtract 90 minutes from 11:30 AM.
- 90 minutes =
1 hour and 30 minutes
So, subtract 1 hour and 30 minutes from 11:30:
- 11:30 – 1 hour = 10:30
- 10:30 – 30 minutes =
10:00 AM
Answer: 10:00 AM
🔹 *Explanation:* To find when the train left, we work backwards from its arrival time. Subtracting the journey duration (90 minutes) gives us the departure time.
---
✔ Final Answers:
1.
7:00 AM
2.
20 minutes
3.
10:00 AM
Let me know if you’d like these explained with diagrams or number lines for visual learning!
Parent Tip: Review the logic above to help your child master the concept of time problem worksheet for grade 2.
