From point A to point B two cars left at the same time. The first drove at a constant speed all the way

| September 20, 2021 | education

From point A to point B two cars left at the same time. The first drove at a constant speed all the way. The second traveled the first half of the journey at a speed of 60 km / h, and the second half at a speed of 20 km / h less, as a result, arrived at point B simultaneously with the first car. Find the speed of the first car

1) Let us find out what speed the second car had on the second half of the journey, if it is known that it was 20 km / h less than the speed on the first half of the journey, and in the first half it was driving at 60 km / h.

60 – 2 = 40 km / h.

2) Let us find out the speed of the second car if it is known that the first car arrived at point B simultaneously with the second car. Let’s find the average speed of the second car on two halves of the way.

(60 + 40) / 2 = 50 km / h.

Answer: the speed of the first car was 50 km / h.



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