Question

Two trucks leave a warehouse at the same time. One travels due north at an average speed of 61 miles per hour, and the other travels due south at an average speed of 60 miles per hour. After how many hours will the two trucks be 544.5 miles apart?

Answer 1

That’s the same as if one truck travelled at 121 mph (60+61).

V = S/t So t = S/V

t = 544.5/121 = 4.5h so 4 hours and 30 min.