Physics

posted by Anonymous

A car travels along a straight stretch of road if receipts for 13.6 miles at 55 mph than 25.8 miles at 48 mph and finally 43.1 miles at 33 mph what is the cart average velocity during the entire trip answer in units of miles per hour

1. Steve

avg speed = (total distance)/(total time)
since time = distance/speed, we have an average speed of

(13.6+25.8+43.1)/(13.6/55 + 25.8/48 + 43.1/33) = 39.46 mi/hr

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