SOLUTION: Elaine jogs and walks to office every day. she averages 4km/hr walking and 8 km/hr jogging. the distance from her house to the office is 6km and she makes a trip in 1 hr. how far d

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Question 479227: Elaine jogs and walks to office every day. she averages 4km/hr walking and 8 km/hr jogging. the distance from her house to the office is 6km and she makes a trip in 1 hr. how far does she jog in a trip.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Elaine jogs and walks to office every day.
she averages 4km/hr walking and 8 km/hr jogging. the distance from her house to the office is 6km and she makes a trip in 1 hr.
how far does she jog in a trip.
:
Let j = jogging dist
then
(6-j) = walking dist
:
Write a time equation, time = dist/speed
:
jog time + walk time = 1 hr
j%2F8 + %28%286-j%29%29%2F4 = 1
multiply eq by 8 to clear the denominators, results:
j + 2(6-j) = 8
j + 12 - 2j = 8
j - 2j = 8 - 12
-j = -4
j = 4 km his jogging dist
:
:
check this find the time of each
4/8 + 2/4 = 1