Ahmir127 Ahmir127

13-08-2014
Mathematics

Answered

A giraffe can run about 14 meters per second. Find it's speed in miles per hour. ( 1 mi = 5280 ft; 1 m = 3.28 )

Answer :

Аноним Аноним

14-08-2014

[tex]1m=3.28ft\\\\1mi=5280ft\to1ft=\frac{1}{5280}mi\\\\1m=3.28\times\frac{1}{5280}\ mi=\frac{3.28}{5280}\ mi=\frac{328}{528000}\ mi=\frac{41}{66000}\ mi\\\\1h=3600s\to1s=\frac{1}{3600}h\\-------------------------\\14\ m/s=(14\times\frac{41}{66000}:\frac{1}{3600})\ mph=(\frac{574}{66000}\times3600)\ mph\\\\=(\frac{574}{55}\times3)\ mph=\frac{1722}{55}\ mph\approx31\ mph[/tex]

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