A car traveled 281 miles in 4 hours 41 minutes.What was the average speed of the car in miles per hour?

Answer 1

1 h = 60 min

41 min = 41 / 60 h

4 h 41 min = 4 + 41 / 60 = 4 ∙ 60 / 60 + 41 / 60 = 240 / 60 + 41 / 60 = 281 / 60 h

average speed = 281 mi / 4 h 41 min = 281 / ( 281 / 60 ) = ( 281 / 1 ) / ( 281 / 60 ) =

281 ∙ 60 / 1 ∙ 281 = 60 / 1 = 60 mi / h