A Cannon makes a noise, and it's echo is heard 4.5 seconds later. if sound travels at 343 m/s:
1 answer:
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Answer: B) 30 km/h
Explanation:
The speed of Ben and Jerry on their way to the store is given by
where
d is the distance they covered
t is the time they took
From the graph, we see that Ben and Jerry travelled for a distance of d=60 km in a time of t=2 h, so their speed is