Zahra built a toy box in the shape of a rectangular prism with an open top. The diagram below shows the toy box and a net of the toy box.

8 ft
7 ft
15 ft

+----------+

| | 15 ft
| | _____
| | | |
+----------+ | | 7 ft
|_____|
8 ft

Diagram of the rectangular prism toy box.

Net of the toy box:
_______________
| | |
| | |
|________|_______|
| | |
| | |
|________|_______|