Starting at home, jessica traveled uphill to the grocery store for 18 minutes at just 20 mph. she then traveled back home along the same path downhill at a speed of 60 mph. what is her average speed for the entire trip from home to the grocery store and back?

Average speed of Jessica is 30 mph.

Step-by-step explanation:

As we know the formula to calculate the average speed is

Average speed =

Jessica traveled uphill to the grocery store for 18 minutes or hours at 20 mph.

So the distance traveled = Speed × time

                                         = 20 ×

                                         = miles

Now she traveled back with same path with the speed of 60 mph.

Time taken in back to home =

                                               =

                                               = 0.1 hours

Total distance covered = 6 + 6 = 12 miles

And total time taken =

                                  = 0.3 + 0.1

                                  = 0.4 hours

Therefore, average speed of Jessica =  

                                                             = mph

Average speed of Jessica is 30 mph.

answer by jkismyhusbandbae:

a) how close a measured value is to the actual (true) value.

  measure of length.   there are 12 inches in a foot, and 36 inches in a yard.   one inch is exactly 2.54 centimeters.

accuracy is how close something is to an actual answer but it is not exactly correct.