60-25=35 minutes: Xiaohong's time from home to the sanitation department.

Then dad only needs 10 minutes to drive this distance, so the time ratio of them driving the same distance is: 10:35=2:7.

Dad went after Xiaohong again, and when he did, the time ratio between them was still 2:7.

Xiaohong has been ahead of her father for 25 minutes.

Then the time required by dad is: 25×2/(7-2)= 10 minutes.

A: Dad/kloc can catch up with Xiaohong in 0/0 minutes.