Question 86997: Mandy begins bicycling W at 20mph. Liz leaves from the same pont 1 hour later bicycling west at 30 mph. When will she catch up with Mandy? Answer by scott8148(6628) (Show Source):
You can put this solution on YOUR website! Mandy has a 20 mi (and 1 hour) head start ... Liz goes 10 mph faster so in 2 hours she will catch up
using rate*time=distance ... let x equal Liz's time ...the distances are equal ... 20(x+1)=30(x)
