The average round trip speed S (in mph) of a vehicle traveling a distance of d miles in each direction is given by S = 2 d d r 1 + d r 2 where r 1 and r 2 are the rates of speed for the initial trip and the return trip, respectively. a. Suppose that a motorist travels 200 mi from her home to an athletic event and averages 50 mph for the trip to the event. Determine the speeds. Necessary if the motorist wants the average speed for the round trip to be at least 60 mph? b. Would the motorist be traveling within the speed limit of 70 mph? e
The average round trip speed S (in mph) of a vehicle traveling a distance of d miles in each direction is given by S = 2 d d r 1 + d r 2 where r 1 and r 2 are the rates of speed for the initial trip and the return trip, respectively. a. Suppose that a motorist travels 200 mi from her home to an athletic event and averages 50 mph for the trip to the event. Determine the speeds. Necessary if the motorist wants the average speed for the round trip to be at least 60 mph? b. Would the motorist be traveling within the speed limit of 70 mph? e
Solution Summary: The author calculates the speed needed for the return trip if the distance is 200mi
The average round trip speed S (in mph) of a vehicle traveling a distance of d miles in each direction is given by
S
=
2
d
d
r
1
+
d
r
2
where
r
1
and
r
2
are the rates of speed for the initial trip and the return trip, respectively.
a. Suppose that a motorist travels 200 mi from her home to an athletic event and averages 50 mph for the trip to the event. Determine the speeds. Necessary if the motorist wants the average speed for the round trip to be at least 60 mph?
b. Would the motorist be traveling within the speed limit of 70 mph? e
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