60. Lucinda ran a 3-mile cross-country course in 24.0 minutes while Frannie ran the same course in 21.0 minutes. Which of the following values, in miles per hour, is closest to the difference between Frannie's average speed and Lucinda’s average speed?

Answer and Explanation

Your Answer is

Correct Answer is H

Explanation

Lucinda's speed is 3÷(24/60) = 7.5 miles/hour, Frannie's speed is 3÷(21/60) ≈ 8.57, so the difference between the two is 1.07, and the closest is 1.1