Darren can get to work in 30 minutes. the speed limit is 35 mph, but there are three stop lights. with the traffic and lights, he can average 30 mph. how far is he from work?

To solve this problem you must apply the proccedure shown below:
 1. You have that Darren can get to work in and with the traffic and lights, he can average .Therefore, you must apply the formula for calculate the distance, which is:
 
 Where  is the speed and  is the time.
 2. The time in hours is:
 
 3. Substituying values, you have:
 
 The answer is: