Answer: The cost of the hydrogen storage tank typically varies with the width of the tank. When the depth and height of the tank are fixed, the width becomes the only variable that affects the cost.
In general, as the width of the tank increases, the cost of the tank also increases. This is because a larger tank requires more material for construction, which results in higher manufacturing costs. Additionally, larger tanks may require more specialized manufacturing processes or materials, further contributing to the increase in cost.
On the other hand, as the width of the tank decreases, the cost of the tank decreases as well. Smaller tanks require less material and are generally easier and cheaper to manufacture.
The relationship between the cost and width of the tank may not always be linear, as other factors such as market demand, manufacturing efficiency, and material costs can also influence the final price of the hydrogen storage tank.
Overall, the cost of the hydrogen storage tank will depend on various factors, but the width of the tank, with fixed depth and height, is a critical determinant of the tank's cost.