2 years ago

50 points for good answ.

Mathematics

1 answer:

amid [387]2 years ago

5 0

Answer:

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.

Then time is:

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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