Question

Brenda left the hardware store and drove toward the recycling plant at an average speed of 20mph. Perry left one hour later and drove the same directions but with an average speed of 30 mph. find the number of hours Brenda drove before Perry caught up.

Answer 1

let Brenda's time driving be t hrs
then Peryy drove for t-1 hrs.

20t = 30(t-1)
20t = 30t - 30
-10t = -30
t = 3

I will leave it up to you to answer the actual question