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

### Instruction:
 Urefu wa pembetatu ni mara nne upana wake. Ikiwa eneo ni 100 m2. urefu wa pembetatu ni upi?


### Response:
 Hebu tuchukue upana wa pembetatu kuwa x.
Urefu wa pembetatu ni 4 * x.
Eneo la pembetatu ni x * 4 * x = 100m2.
4 * x * x = 100
3 * x * x = 100
x * x = 30
x = <<5=5>>5
Urefu wa pembetatu ni 4 * 5 = <<4*5=20>>20 m.