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Bogdan [553]
3 years ago
9

Mr. Smith drove for 45 minutes at a speed of 40 km/h. He stopped for 15 minutes for a coffee break and then he drove for 2 hours

at a speed of 75 km/h. What was his average speed for the entire journey?
Mathematics
1 answer:
djverab [1.8K]3 years ago
3 0

Answer: The answer is 65 5/11

Step-by-step explanation: The first portion would be 30km. Second portion not counting coffee stop would be 150km. Since the average speed is distance/Time it would be 180/Time. Time =2 3/4. Answer is 65 5/11. I hope this is correct.

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M>5=m>4
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by substituting
m>4+37=180
m>4=143
m>2=m>7=37
m>4=m>8
m<3+m>5=180
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