Answer:
40 mph: 4 hours 15 minutes
45 mph: 3 hours 46 minutes 40 seconds
Explanation:
The rate of separation = 45 + 40 = 85 mph
speed = distance / time
85 = 170 / t
t= 170/85 hour
2 hours
45x + 40x = 170
85x = 170
x = 2
7.6m questions
10.1m answers