When the tourist drove 20 km, then up to half the distance between the cities he had to travel 60 km.

When the tourist drove 20 km, then up to half the distance between the cities he had to travel 60 km. Find 1/4 of the distance between cities.

1. First, let’s calculate how many km is half the distance between cities. To do this, add up the 20 km that he covered from 60 km, which he had to cover until the middle of the way:
20 + 60 = 80 (km).
2. Now you can find 1/4 of the distance between cities by dividing half the distance in half:
80/2 = 40 (km).
Answer: one-fourth of the distance between cities is 40 km.