# 1.35

Assumptions:

approx 400000 cars
each car needs to refuel once a week
each gas station is open 10 hours a day and refuels 10 cars an hour
there are enough stations to refuel all cars once per week

Calculation:

cars that can be fueled by 1 station in 1 week
10*10*7=700
a number of gas stations (rounded up):
ceil(400000/700)=572

A slightly different approach:

• approx 300 mln cars in the US (1 car per each citizen).
• each station is open 12hr a day, has 6 places for taking fuel, each fueling takes about 6 min
• amount of cars using given gas station daily: ${\displaystyle 6*12*{\frac {60}{6}}=6*120=720}$
• gas station (at least in Europe) are used always used, so: ${\displaystyle {\frac {300000000}{720}}\approx 333000}$ gas stations.

Back to Chapter 1.