Mathematics
hr28
100

Irina rode her bike to work at an average speed of 16 miles per hour. It started to rain, so she got a ride home along the same route in her coworker’s car at an average speed of 27 miles per hour. If Irina’s ride home in the car took 24 minutes (0.4 of an hour), how many hours was her bike ride to work, to the nearest tenth of an hour?

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(1) Answers
kitty122

Two parts. First find the distance to work, second find the time to travel that distance by bike.  27 mph for .4 hours = 10.8 miles.  10.8 miles/16 mph = .675 hours Rounded to the nearest tenth of an hour, .7 hours. Therefore the solution is .7 hours. 

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