Brodie and Ryan are driving directly towards each other. Brodie is driving at a constant speed of 50\:km/h. Ryan is driving at a constant speed of 40\:km/h. If they are 120\:km apart, how long will it take before they meet?
Answer Choices
A. 1 h 12 min
B. 1 hr 25 min
C. 1 hr 15 min
D. 1 hr 33 min
E. 1 hr 20 min