Answer:
1. C
2. B
3. D
4. A
Explanation:
1. As mentioned in the last sentence of the passage, the main goal of the problem is to figure out how long it took John to get ready.
2/3/4. The goal is to find the amount of time John took to get ready and to obtain that time you need to use 6:10-5:30=n. After solving the number sentence, you should get 40 minutes.