Question

The schematic diagram below shows the volume of passsangers (in tens of thousands) through the airports, A, B, C, D, E, F and G on the 15th of March 2010. Without the use of a calculator, find the values of x, y and z if there are 10,000 more arrivals than departures at C, 20,000 more departures than arrivals at D and an equal number of arrivals and departures at E.

Answer 1

Is volume of passangers = number of passengers departing + arriving at an airport???

Answer 2

yes, form equations at each node and solve them

Answer 3

for example, at node C :-
arrivals = 4+3
departures = x+y

there are 10,000 more arrivals than departures at C
so,
4+3 = x+y+1 -----------------(1)

Answer 4

similarly setup equations at two other nodes and solve them

Answer 5

Alright. So what i said is right?

Answer 6

yes volume is same as number of passengers at any given time = in + out