Question
amy wants to travel from elmtown to lakeside at an average speed of 50 miles/hour. she travels half the distance and discovers that her average speed has been only 25 miles/hour. how fast must she drive for the remaining part of the trip if she is to average 50 miles per hour for the entire trip?
Answers
she has gone half the distance at half of her desired speed
she has used up all the time needed for her desired trip
she needs to be at lakeside NOW ... magic maybe?
she has used up all the time needed for her desired trip
she needs to be at lakeside NOW ... magic maybe?
(25 + (50+x))/2 = 50.
(75 + x)/2 = 50,
75+x = 100,
X = 25 mi/h.
50 + x = 50 + 25 = 75 mi/h during 2nd half of trip.
(75 + x)/2 = 50,
75+x = 100,
X = 25 mi/h.
50 + x = 50 + 25 = 75 mi/h during 2nd half of trip.
Related Questions
A motorist travels 120 miles to his destionation at an average speed of 60 miles per hour and return...
A hiker can walk 2 miles in 43 minutes.
What is his average speed in miles per hour? Round your a...
Amy wants to travel from elm town to lakeside at an average speed of 50 miles per hour. She travels...
Reposting see if someone else comes up with a different answer.
Amy wants to travel from Elm town t...