A restaurant occupying the top floor of a skyscraper rotates as diners enjoy the view. Ling and Sarah notice that they began their meal at 7:00 P.M. looking due north. At 7:45 P.M. they had rotated 180° to a view that was due south. At this rate, how many degrees will the restaurant rotate in 1 hour?
A.) 90° B.) 180° C.) 240° D.) 270° E.) 400°
Set up a proportion.
The restaurant rotated 180° in 45 minutes. You need to find how many degrees it would rotate in 60 minutes. 180° x°  =  {set up a proportion} 45 minutes 60 minutes 10,800 = 45x {crossmultiplied} x = 240 {divided each side by 45} C.) 240° Ask Algebra House Comments are closed.

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