Two cars drove towards each other and met after 7 hours. The first car moved at a speed of 54 km / h.
| December 31, 2020 | education
Two cars drove towards each other and met after 7 hours. The first car moved at a speed of 54 km / h. At what speed did the second car move. If the distance between them was originally 721 km?
s = 721 – distance between 2 cars at the beginning of the path
v1 = 54 -speed of the 1st car
v2 – speed of the 2nd car
t = 7 – travel time to the meeting
s = v1 * t + v2 * t – the formula for the distance traveled by 2 cars
721 = 54 * 7 + v2 * 7
721 = 7 * (54 + v2)
103 = 54 + v2
v2 = 103-54 = 49
The speed of the second car was 49 kmph
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