SOLUTION: Please help me solve this problem: A car leaves a town at 120 kilometers per hour. How long will it take a second car, travelling at 135 kilometers per hour, to catch the first car

Question 968710: Please help me solve this problem: A car leaves a town at 120 kilometers per hour. How long will it take a second car, travelling at 135 kilometers per hour, to catch the first car if it leaves 1 hour later?
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
_________________rate___________time__________distance
firstcar__________r_____________t+k____________d
secondcar_________R______________t_____________d

KNOWN:
r=120
R=135
k=1
UNKNOWN:
t, d, the travel time of second car and the distance when equal for both cars

RT=D relationship gives the system of equations,

Solve the system for t and d. The question specifically asks for t. The two formulas for d can simply be equated and then solved for t.
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