SOLUTION: Every day Jane and Bill both drive to a parking lot, and then take the subway to get to work. Jane drives 90 km at 60 km/h, and then takes a northbound subway that averages 28 km/h

Question 1097584: Every day Jane and Bill both drive to a parking lot, and then take the subway to get to work. Jane drives 90 km at 60 km/h, and then takes a northbound subway that averages 28 km/h for 21 km while Bill drives 20 km at 45 km/h and then takes a southbound subway that averages 18 km/h for 30 km. It takes each of them 25 minutes to change from car to subway, and they arrive at the same destination at 8:30 am. At what time does the earliest of them leave home?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I can run this backwards, and place them
both at the same time at destination
Janes time:

------------------

------------------
Bill's time:

------------------

------------------
Add
to each one's time
--------------------------
Jane's time:

Bill's time:

--------------------------------------
Jane's time is longer, so she left the earliest at
8:30 - ( 2 hrs + (2/3)*60 )
8:30 - 2hrs - 40 min
--------------------
This is 6:30 - 40 min or
6:00 - 10 min or
5:50
-------------------------
definitely get a second opinion if needed
check the math

RELATED QUESTIONS
Every day, Jane and Bill both drive to a parking lot, and then take a subway to get to... (answered by math_tutor2020)

Every day, Jane and Bill both drive to a parking lot, and then take a subway to get to... (answered by MathLover1)

Every day Jane and Bill both drive into a parking lot, and then take a subway to get to... (answered by ikleyn,math_tutor2020)

Roman and Paul are driving on the same highway and both drive at a constant speed. Roman... (answered by ikleyn)

Jane has to drive 60 miles to her parents. How long will the journey take if she drives... (answered by anteater)

jane runs three and a half km in 70 minutes . How long will it take her to run 9 km ? (answered by skartikey)

Joe drove 210 km at 70 km/h and then another 210 km at 105 hm/h. It took Bill the same... (answered by mananth)

Jill travels to work in one hour and 30 minutes. Jane travels to work in one hour and 20... (answered by ewatrrr)

Jane started north 2 hours ahead of Julie who was also northbound from the same location. (answered by Paul)