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velikii [3]
2 years ago
15

50 points for good answ.

Mathematics
1 answer:
amid [387]2 years ago
5 0

Answer:

  • 2v

Step-by-step explanation:

Let the distance be d and average speed be v.

Half of the distance the speed was 2/3v

Let the speed be xv in the second half of the distance.

<u>Then time is:</u>

  • d/v = d/2 : (2/3v) + d/2 : (xv)
  • d/v = 3/4(d/v) + (1/2x)(d/v)
  • 1 = 3/4 + 1/2x
  • 1/2x = 1 - 3/4
  • 1/2x = 1/4
  • 2x = 4
  • x = 2

The rest of the road car has to ride with speed of 2v

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