A group of tourists left point A at a speed of 3.5 km / h. After 1.4 hours, a pedestrian came out to meet
A group of tourists left point A at a speed of 3.5 km / h. After 1.4 hours, a pedestrian came out to meet her from point B, located at a distance of 10 km from the first and moved at a speed of 4.2 km / h. What was the distance between these groups of people 0.4 hours after the pedestrian left
1. Find out how many kilometers a group of tourists covered in 1.4 hours if it was moving at a speed of 3.5 kilometers per hour:
1.4 * 3.5 = 4.9 (km).
2. Let’s determine how many kilometers a group of tourists covered in 0.4 hours if they were moving at a speed of 3.5 kilometers per hour:
0.4 * 3.5 = 1.4 (km).
3. Let’s find how many kilometers a pedestrian traveled in 0.4 hours if he walked at a speed of 4.2 kilometers per hour:
0.4 * 4.2 = 1.68 (km).
4. Find out how many kilometers they covered:
4.9 + 1.4 + 1.68 = 7.98 (km).
5. Let’s determine what distance was between them in 0.4 hours after the pedestrian left:
10 – 7.98 = 2.02 (km).
Answer: there were 2.02 kilometers between them.