The tourist walked 2 km at a speed of 5 km / h, and the next 2 km at a speed of 4 km / h.

The tourist walked 2 km at a speed of 5 km / h, and the next 2 km at a speed of 4 km / h. Find the time spent by the tourist for the entire journey.

1. Find out how long it took a tourist to walk two kilometers if he was moving at a speed of 5 kilometers per hour:
2: 5 = 2/5 = 4/10 = 0.4 (h).
2. Let’s determine how long it took a tourist to walk two kilometers if he was moving at a speed of 4 kilometers per hour:
2: 4 = 2/4 = 2 / (2 * 2) = 1/2 = (1 * 5) / (2 * 5) = 5/10 = 0.5 (h).
3. Let’s find how much time the tourist spent on the entire path, if he first covered 2 kilometers in 0.4 hours, and then another 2 kilometers in 0.5 hours:
0.4 + 0.5 = 0.9 (h).
Answer: 0.9 hours.