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Kendall rode her bike 7 miles in 45 minutes. If she maintains this speed, how far can she ride in 2 hours? Round your answer to the nearest tenth of a mile.

Kendall can ride about ___ miles in 2 hours.

1 Answer

2 votes

Answer:

18.7 miles

Explanation:

You want to know how far Kendall can ride her bike in 2 hours if she rides at the speed of 7 miles in 45 minutes.

Proportion

The question assumes that distance is proportional to time, so the distance (d) of interest can be written in the proportion ...

miles/minutes = 7/45 = d/120 . . . . . . 120 minutes is 2 hours

Multiplying by 120, we have ...

d = 120(7/45) = 7(8/3) = 18 2/3 ≈ 18.7

Kendall can ride about 18.7 miles in 2 hours.

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