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

Question

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] · Answer 1 · 2022-03-30T18:37:20+03:00

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.