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

### Instruction:
John decided to start rowing around a square lake.  Each side of the lake is 15 miles.  Jake can row at twice the speed he can swim.  It takes him 20 minutes to swim 1 mile.  How long, in hours, does it take to row the lake?

### Response:
 Inamchukua dakika 20 kuvuta maili 1 na anaweza kuvuta kwa kasi mara mbili ya kasi yake ya kuogelea kwa hivyo inamchukua dakika 20/2 = <<20/2=10>>10 kuvuta maili 1.
Umbo la ziwa ni 4*15 = <<4*15=60>>60 maili.
Inamchukua dakika 10 kuvuta maili 1 na anahitaji kuvuta maili 60 kwa hivyo inamchukua dakika 10*60 = 600 kuvuta ziwa.
Saa 1 ni dakika 60 na inamchukua dakika 600 kuvuta ziwa kwa hivyo jumla ni 600/60 = <<600/60=10>>10 masaa.