Question 874895
Q:
A truck and car leave a service station at the same time and travel in the same direction. The truck travels at 56mph and the car at 40mph. they can maintain radio contact within a range of 12 miles. When will they lose contact?
A:
They will lose contact after x hours.
So 56x - 40x = 12
16x = 12
x = 12/16 = 3/4 hours = 45 minutes