ut of
A
X1
B X4 C
X3
X4
D
x2
F
X2
E
x5
If the flow in, at intersection A, is 300 cars and the flow out, at D, is 300 cars, consider the following question: the total time it takes
vehicles to travel along any stretch of road is proportional to the traffic along that stretch. For example, the total time it takes the
vehicles along AB is
kx1
minutes. Assuming that the constant is the same for all sections of road, the total time for all 300 vehicles to be in this network is
kx_1 + 2kx_2 + kx_3 + 2kx_4 + kx_5 minutes
What is the total time if k = 3?
a. 303 minutes
b. (3t + s, t, 2t + s, t, s) where t and s go from 0 to 300 minutes
c. None of these choices
d. (3t + s, t, 2t + s, t, s) where t and s go from 300 to 600 minutes
e. 2700 minutes
f. 900 minutes
?