Distance between cities is 522 km. The car overcame it in 9 hours. 3 hours, he drove at a speed of 56 km / h

| January 4, 2021 | education

Distance between cities is 522 km. The car overcame it in 9 hours. 3 hours, he drove at a speed of 56 km / h, then increased the speed by 5 km / h and drove for another 2 hours. At what speed the car needs to travel the rest of the way.

1. We calculate the length of the path covered by the car in the first 3 hours of movement:
56 x 3 = 168 kilometers.
2. We calculate with what speed the car was traveling for the next 2 hours:
56 + 5 = 61 km / h.
3. Calculate the length of the path covered by the car at this speed:
61 x 2 = 122 kilometers.
4. We calculate how many hours the car traveled the remaining distance:
9 – 3 – 2 = 4 hours.
5. We calculate the length of the remaining path:
522 – (168 + 122) = 232 kilometers.
6. We calculate the speed of the car on this section:
232: 4 = 58 km / h.
Answer: the speed of the car on the remaining section should be 58 km / h.



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