AnswersEAP-Algebra Functions and Data Analysis A CRSolving Rate ProblemsQuestion 3
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Solving Rate Problems

Question 3 • EAP-Algebra Functions and Data Analysis A CR

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?

Answer
A
0.2 of an hour
B
0.4 of an hour
C
0.6 of an hour
D
0.7 of an hour

Explanation

The car ride covered 27 × 0.4 = 10.8 miles. Since Irina traveled the same route by bike, her bike ride also covered 10.8 miles, so it took 10.8 ÷ 16 = 0.675 hour. Rounded to the nearest tenth, that is 0.7 hour, choice D.

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