Hermione is walking and reading a book. She walks 1250 meters, then realizes she walked too far past Harry’s house. She turns around and walks back 350 meters. The entire walk takes her 320 seconds. What is Hermione’s average speed
Question
Hermione is walking and reading a book. She walks 1250 meters, then realizes she walked too far past Harry’s house. She turns around and walks back 350 meters. The entire walk takes her 320 seconds. What is Hermione’s average speed
Solution
To calculate Hermione's average speed, we need to know the total distance she walked and the total time it took her.
Step 1: Calculate the total distance Hermione walked 1250 meters and then walked back 350 meters. So, the total distance she walked is 1250 meters + 350 meters = 1600 meters.
Step 2: Convert the time from seconds to hours There are 3600 seconds in an hour. So, 320 seconds is 320/3600 = 0.0889 hours.
Step 3: Calculate the average speed The formula for average speed is total distance/total time. So, Hermione's average speed is 1600 meters/0.0889 hours = 17994.37 meters per hour.
So, Hermione's average speed is approximately 17994.37 meters per hour.
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