Tuesday, August 19, 2014

Average Speed problem

Starting at home, Tiffany traveled uphill to the toy store for 24 minutes at just 15 mph. She then traveled back home along the same path downhill at a speed of 30 mph.
What is her average speed for the entire trip from home to the toy store and back?

The average speed is not just the average of 15 mph and 30 mph.
She traveled for a longer time uphill (since she was going slower), so we can estimate that the average speed is closer to 15mph than 30 mph.
To calculate the average speed, we need to make  use of the following:
average speed= total distance  /  total time

The rest of it is not too difficult. Can check the video to see
 how it is done for a similar problem.










  


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