Why does a tank vehicle's shape (typically round or elliptical) matter for structural strength compared to a rectangular box trailer?

Pick an answer

1. A round or elliptical shape distributes internal pressure from the liquid more evenly, reducing stress points
2. Tank shape has no relationship to how internal pressure is distributed, since pressure depends only on the liquid's volume
3. Shape only matters for the tank's exterior appearance
4. Rectangular tanks are always stronger than round ones for liquid cargo

Correct!

Not quite. The correct answer is highlighted.