The distance between A and B is 3400 m. Amy walks from A to B in 40 minutes and takes 5 minutes more to return to A. What is Amy's average speed in m/min for the whole journey from A to B and back to A again?
The distance between A and B is 3400 m. Amy walks from A to B in 40 minutes and takes 5 minutes more to return to A. What is Amy's average speed in m/min for the whole journey from A to B and back to A again?
The distance between A and B is 3400 m. Amy walks from A to B in 40 minutes and takes 5 minutes more to return to A. What is Amy's average speed in m/min for the whole journey from A to B and back to A again?
1 Answer
Dec 29, 2017
Explanation:
Distance between A to B =
Distance between B to A =
Therefore, total distance from A to B and back to A =
Time taken by Amy to cover the distance from A to B =
and, time taken by Amy to return back from B to A =
So, total time taken by Amy for the entire journey from A to B to A =
Average speed = total distance/total time =