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Previous Year Question (PYQs)
1
The following sketch shows the pipeline carrying material from one
location to another. The capacity of each pipeline is 2000. The demand for the material at B is 800, at C is
800, at D is 1400 and at E is 400. The arrow indicates the direction of material flow through pipeline. The
flow through pipelines meets exactly the demand at each location, flow from B to C is 600.
The quantity moved from A to E is
Solution
Demands:
B = 800
C = 800
D = 1400
E = 400
Given:
Flow from B → C = 600
So C still needs:
800 − 600 = 200 (must come from A)
Flow needed from A to satisfy total demands:
Total demand = 800 + 800 + 1400 + 400 = 3400
Total flow entering is from A only → So A must supply all: 3400
Distribution:
To B → 800
To C → 200 (because 600 already coming from B)
To D → 1400
To E → 400
So quantity A → E = 400
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