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GenaCL600 [577]
3 years ago
11

Vincent sets off from his home on a 70 km journey to his friend's house. He travels the first 40 km of his journey at an average

speed of 40 km/h and the remaining at an average speed of 60 km/h. Calculate the average speed for his entire journey.
Mathematics
2 answers:
bonufazy [111]3 years ago
7 0

Answer:

46\frac{2}{3}\:\mathrm{km/h}

Step-by-step explanation:

Average speed can be given by:

S=\frac{d}{t}, where d is the total distance travelled and t is the time it takes to travel said distance.

Vincent total travels 70 kilometers in a total time of:

\frac{40}{40}+\frac{30}{60}=1.5\:\mathrm{hours}.

Therefore, his average speed during the entire trip is:

S=\frac{70}{1.5}=\fbox{$46\frac{2}{3}\:\mathrm{km/h}$}.

Ilia_Sergeevich [38]3 years ago
3 0

Answer:

50km/h.

Step-by-step explanation:

70  km \:  {5}^{2}

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