It's a rectangular parallelepiped, also known as a box. It has three pairs of congrurent rectangular faces, so adding them all up,
Area = 2 × (8×6 + 5×6 + 8×5) = 236 sq ft
Answer: 236 sq ft
From 11 am to 2:15 pm it is 3 hrs and 15 min
Well, the formula for a triangle is base times height times 1/2. In this case it would be 21x30. That equals 630. Then, you divide 630 by 2 which is 315. Your answer would be 315 squared.