Asked by Anonymous

Billy and Ellie ride their bikes from their neighborhood to their school 7.25 kilometers away. At the end, Billy races ahead and gets there 3 minutes before Ellie. What is the difference in their average speed if it took Ellie 29 minutes to get to school?
Answered by oobleck
Ellie: 7.25km/29min = 0.25 km/min
Billy: 7.25km/26min = 0.279 km/min
Billy-Ellie = 0.029 km/min
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