Write the answer in the format HH:MM.

Answer: $11:47$

Exact match of the answer -1 point

## Solution.

Since Pechkin's clock is 20 minutes fast, but he thinks it is 10 minutes slow, he adds half an hour to any actual time. Thus, at 11:30, Pechkin thinks it is already 12:00.

Accordingly, thinking that he is 17 minutes late, he will arrive not half an hour early, but $30-17=13$ minutes early.
# Task No. 8.1

## Condition:

Postman Pechkin thinks that his watch is 10 minutes slow, but in reality, it is 20 minutes fast. He agreed with Uncle Fyodor to meet at the post office at $12:00$, and then called and said that he wouldn't make it on time and would be 17 minutes late. At what time will Pechkin actually arrive for the meeting?