Question 908533
Algebraic solution
t*(20-15)=200
t*5=200
t=200/5
t=40 hours
check
40(20-15)=200
40(5)=200
200=200
ok
200 15 20 0 0
Gaining speed 20-15= 5 mph
Headstart 200 =200 miles
Time to catch up =40 hours