Two cones with the same base diameter of 14 cm and height of 15 cm are joined together along their bases. The volume of the shape so formed is:

Two right prisms have the same height, but their triangular bases have areas in the ratio 3:5. What is the ratio of their volumes?

An artist carves an ice sculpture in the shape of a right triangular pyramid. The base is a triangle with a base of 6 cm and a height of 4 cm, and the pyramid's height is 9 cm. What is the volume of ice used?