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

### Instruction:
Keanu was surfing towards the shore at a speed of 20 miles per hour.  A shark was swimming alongside him, riding the same wave, when it doubled its speed and moved away from Keanu.  There was a pilot fish swimming alongside Keanu and the shark, and when the shark increased its speed, the pilot fish also increased its speed and moved away from Keanu, but only increasing its speed by half as much as the shark had increased its speed by.  What speed, in miles per hour, was the pilot fish swimming when it moved away from Keanu?

### Response:
 Papa iliongeza kasi yake kutoka maili 20 kwa saa hadi kasi ya mwisho ya maili 20*2=<<20*2=40>>40 kwa saa.
Kwa kuwa papa na samaki rubani waliongeza kasi zao kwa kiasi sawa, papa iliongeza kasi yake kwa 40-20=<<40-20=20>>20 maili kwa saa.
Kwa kuwa samaki rubani iliongeza kasi yake kwa nusu ya kasi ambayo papa iliongeza kasi yake, hii inamaanisha samaki rubani iliongeza kasi yake kwa 20/2=<<20/2=10>>10 maili kwa saa.
Hivyo, samaki rubani alikuwa akiswimia kwa kasi ya 20+10=<<20+10=30>>30 maili kwa saa wakati iliondoka mbali na Keanu.