Stacy and heather are 20 miles apart and walk towards each other along the same route. STacy walks at a constant rate that is 1 mile per hour faster than heathers constant rate of 5 mph. If heather starts her journey 24 minutes later after stacy, how far from her original desintation has heather walked when the two meet?
qa is 8
to do this: manhattan gmat explains that one must set up a double rate chart.
Stacy heather total
R 6mph 5 mph -----
T t +.4 hours t hours -----
D 20-d miles d miles 20 miles
Obviously Stacy gets time plus a variable because she has been traveling longer. But the distance I dont understand. Why is Stacy's distance 20-d and heathers distance d.
Can they be switched back and forth?
How to know which one gets what distance?
Side note: other than og are there any sources to go to to master this topic!
qa is 8
to do this: manhattan gmat explains that one must set up a double rate chart.
Stacy heather total
R 6mph 5 mph -----
T t +.4 hours t hours -----
D 20-d miles d miles 20 miles
Obviously Stacy gets time plus a variable because she has been traveling longer. But the distance I dont understand. Why is Stacy's distance 20-d and heathers distance d.
Can they be switched back and forth?
How to know which one gets what distance?
Side note: other than og are there any sources to go to to master this topic!
Appetite for 700 and I scraped my plate!
I use a similar technique to this but this is good as well..just seen that
