Question 696235
D=RT
D=42T FOR THE FIRST CAR.
D=81.14(T-.5) FOR THE SECOND CAR.
THE 2 DISTANCES ARE THE SAME.
42T=81.14(T-.5)
42T=81.14T-40.57
42T-81.14T=-40.57
-39.14T=-40.57
T=-40.57/-39.14
T=1.037 HOUR ANS.
PROOF:
42*1.037=81.14(1.037-.5)
43.53=81.14*.537
43.55=43.57