SOLUTION: Marie jogs at an average speed of 6 miles per hr for 1.5 hrs along a straight path and then turns around to jog back to her starting point.Marie had scheduled 2.5 hrs to jog the to
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Question 364896: Marie jogs at an average speed of 6 miles per hr for 1.5 hrs along a straight path and then turns around to jog back to her starting point.Marie had scheduled 2.5 hrs to jog the total distance.If Marie is to arrive back exactly on scheduled , at what average speed , in miles per hrs, must she3 jog back to her starting point? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! Marie jogs at an average speed of 6 miles per hr for 1.5 hrs along a straight
path and then turns around to jog back to her starting point.
Marie had scheduled 2.5 hrs to jog the total distance.
If Marie is to arrive back exactly on scheduled, at what average speed, in miles
per hrs, must she jog back to her starting point?
:
Find the distance to the point he turns around.
1.5 * 6 = 9 mi
This is also the distance to the starting point
2.5 - 1.5 = 1 hr is the time required to return to the starting point
It's obvious he has to jog at 9 mph, to go 9 mi in 1hr
:
Confirm this with a time equation
Write a time equation: time = dist/speed + = 2.5
1.5 + 1 = 2.5
