SOLUTION: It takes Sam 10 minutes to get to school going at a speed of 27 miles/hour. How long will it take her to get to school if she goes 40 miles/hour?

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Question 1017963: It takes Sam 10 minutes to get to school going at a speed of 27 miles/hour. How long will it take her to get to school if she goes 40 miles/hour?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+d+=+r%2At+
Convert minutes to hrs
+10%2F60+=+1%2F6+ hrs
+d+=+27%2A%281%2F6%29+
+d+=+4.5+
She is 4.5 mi from school
----------------------
Let +t+ = her time in hrs to get
to school at 40 mi/hr
+d+=+r%2At+
+4.5+=+40%2At+
+t+=+4.5%2F40+
Convert this back to minutes by
multiplying by +60+
+t+=+4.5%2A%28+3%2F2+%29+
+t+=+13.5%2F2+
+t+=+6.75+
This is 6 min 45 sec time to get
to school at 40 mi/hr