Answer:
Economies of scale
Explanation:
Economies of scale is described as the cost benefit or advantage which is experienced through the firm, when it rises the output level. Under economies of scale, the fixed costs did not vary or change with decreases or increases in the units of the production volume and the variable costs are dependent with rise in the output.
So, in this case, when the circumference is doubled of the oil pipeline, more than the volume doubles. This technique is selected through the large firms or business as it will result in the economies of scale.
