Tourists traveled 24 km on the first day, on the second day, 2 times more than on the first.

Tourists traveled 24 km on the first day, on the second day, 2 times more than on the first. After that, they had to drive another 15 km halfway. What is the total length of the tourist route?

First of all, let’s find out what distance the tourists traveled on the second day, if, according to the condition of the problem, on the second day they traveled 2 times more than on the first day, and on the first day they traveled 24 km.
Thus, we get:
24 * 2 = 48 (km).
According to the condition, after they covered 24 km and 48 km in two days, they still have 15 km to half the way. Let’s find what half the route of tourists is equal to:
(24 + 48) + 15 = 87 (km).
Now let’s calculate the total length of the route if half of this length is 87 km:
87 * 2 = 174 (km).
Answer: the total length of the tourist route is 174 km.