Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Josh built his little brother a rectangular sandbox.  The perimeter of the sandbox is 30 feet and the length is twice the width. What is the width of the sandbox?

### Response:
 Kuna pande nne katika pembetatu, upana ni W na urefu ni 2W, na tunaweza kuweka hivyo katika hii equation: W + W + 2W + 2W = futi 30.
Tukiongeza pande zote pamoja, tunapata 6W = futi 30.
Ili kupata W, tunagawanya pande zote kwa 6, kama hivi: 6W / 6 = futi 30 / 6, hivyo W = futi 5.