Question 135669
Distance(d) equals Rate(r) times Time(t) or d=rt;  r=d/t and t=d/r


Let t=the time it takes the car to catch the truck after the car starts the trip.

Now we know that when the car starts travelling, the truck has already travelled 45*1 or 45 mi

distance truck travels=45+45t
distance car travels =60t

When these distances are equal, then the car will have caught the truck, so:

45+45t=60t  subtract 45t from each side

45+45t-45t=60t-45t  collect like terms

45=15t  divide both sides by 15

t=3 hrs-------------time it takes the car to catch the truck after the car begins the trip.

CK

45+45*3=60*3

45+135=180
180=180


Hope this helps---ptaylor

Distance car tra