Tourists first walked at a speed of 5 km h and then reduced it to 4 whole 1.2 km h in just 6 hours they covered 28 km.

Tourists first walked at a speed of 5 km h and then reduced it to 4 whole 1.2 km h in just 6 hours they covered 28 km. Find the time of movement of tourists at both speeds.

The solution of the problem:
4 1/2 = 4.5 => the number of hours at this speed must be even, since we have covered 28 km in total.
Let, with a speed of 4.5 walked for 4 hours
1) 4.5 * 4 = 18 km
2) 6-4 = 2 (h) – walked at a speed of 5 km / h
3) 5 * 2 = 10 km
4) 18 + 10 = 28 (km)
Answer: we walked at a speed of 5 km / h for 2 hours, and at a speed of 4 1/2 – 4 hours.