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The Baldwin family walked four over five of a mile in four over nine of an hour. What is their unit rate in miles per hour?

A. four-ninths over four-fifths equals four over nine mile per hour
B. four-fifths over four-ninths equals one and four-fifths miles per hour
C. four-ninths over four-fifths equals one and four-fifths miles per hour
D. four-fifths over four-ninths equals four over nine mile per hour

2 Answers

3 votes
B, four-fifths over four ninths

User Venura Athukorala
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8.0k points
4 votes

Answer: Option 'B' is correct.

Explanation:

Since we have given that

Number of miles the Baldwin family walked is given by


(4)/(5)\ miles

Number of hours the Baldwin family walked is given by


(4)/(9)\ hour

So, we need to find the unit rate in miles per hour.


Speed=(Distance)/(time)\\\\Speed=((4)/(5))/((4)/(9))\\\\Speed=(9)/(5)=1(4)/(5)\ mph

Hence, Option 'B' is correct.

User Kyle Siegel
by
8.4k points