Question

Mr. Anders and Ms. Rich each drove home from a business meeting. Mr. Anders traveled east at 100 Kilometers per and hour and Ms. Rich traveled west at 80 kilometers per hour. In how many hours were they 100 kilometers apart?

Answer 1

D = 100 km/hr * t + 80 km/hr * t = 100
D = 100t + 80t = 100,
180t = 100,
t = 100 / 180 = 0.56 hours.