A prism has a right-angled triangular cross area and a hollow space with a square cross-section. The sides of the triangle are 9 cm, 12 cm and 15 cm respectively.
The volume of the material used to construct the prism is 350 cm3.If the height of the prism is 13 cm, what is the length of the hollow square space (correct to 3 sig. fig.)?
What is the total surface area of the prism (correct to 3 sig. fig.)?