As per Weber's theory of industrial location a line of equal transport cost for any material or product is called :

Question

Accepted Answer

According to Weber's theory of industrial location, an **isotim** is a line of equal transport cost for any material or product. Weber used isotims to illustrate the transport costs associated with different locations. By drawing isotims for various inputs and the final product, he could determine the location that minimized total transport costs.

Here's why the other options are incorrect:

*   **Isodapane:** An isodapane represents a line of equal total transport costs. It's formed by connecting points where the total transport costs (considering all inputs and the final product) are the same. It's *not* a line of equal transport cost for a *single* material or product, but rather the *aggregate* cost.

*   **Critical Isodapane:** The critical isodapane is the isodapane that defines the limit beyond which it becomes more profitable to locate at the raw material source or the market, rather than at the least-transport-cost location. It's a specific type of isodapane, but again, it deals with *total* transport costs, not the cost for a single material or product.

*   **Isotone:** This term is not directly related to Weber's theory of industrial location. Isotones are lines connecting points of equal atmospheric pressure change during a specified time interval. It's a meteorological term, not an economic geography term relevant to Weber's model.

Therefore, only the term **isotim** accurately describes a line of equal transport cost for a single material or product within the context of Weber's theory.