PPP - FC10

Two buildings have the same square footage and exterior wall construction.

One building has 'T' shaped plan, second building is square in plan. Which building is less expensive to construct if you look at the costs of exterior building envelope along?

1. 'T' shaped building is less expensive.
2. Square building is less expensive.
3. The cost of the exterior building envelop is the same for both buildings.
4. 'T" shaped building is twice as expensive as a square one.