Kamo1314
Bill and Amy want to ride their bikes from their neighborhood to school which is 14.4 kilometers away. It takes Amy 40 minnutes to arrive at school. Bill arrives 20 minutes after Amy. How much faster (in meters/second) is Amy's average speed for the entire trip?
2 Answers
Bob/PKB
It takes Amy 40 minutes and Bill 60 minutes.
In 10 minutes, Amy has traveled 3.55 m; Bill has traveled 2.37 m. Amy has gone 1.18 m further
Amy travels 7.2 m in 20 minutes. Bill travels 4.733333 m in 20 minutes Amy has gone 2.4667 m further.
In 30 minutes, Amy has gone 10.65 compared to Bill's 7.2 (3.45 m difference)
Amy has reached her destination in 40 minutes; Bill has gone 9.4667 m (4.73 m. difference)
After 50 minutes, Bill's gone 11.833 m, and after 60 minutes, has completed the 14.2 m trip.
Amy's average speed is: 21.3 mph; Bill's is 14.2 mph. Amy travels 1.333x faster than Bill.
| 14 years ago. Rating: 1 | |
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