Where is the oldest oceanic crust found? youngest?

The cross section of rectangular prism a measures 1.5 units by 1 unit. the cross section of triangular prism b has a base that measures 2 units and a height of 1.5 units. if the length of each prism is 1.81 units, which statement is true?

What are the answers for the following questions?

Some of the incoming solar radiation is absorbed by the floor. identify the type of electromagnetic energy reradiated by the floor