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

### Instruction:
Kris is blowing u balloons for her sister’s party. She has 30 minutes to blow up as many balloons as possible and decides to enlist her brother’s help to increase the number of balloons. Kris can blow up a total of 2 balloon per minute, and her brother works twice as fast. After 15 minutes, her brother doubles his speed and works at this new speed for the remaining 15 minutes. After the 30 minutes, how many balloons, in total, did Kris and her brother blow up?

### Response:
 Kris anavuma maballuni 2 kwa dakika kwa dakika 30, kwa jumla ya maballuni 2*30=<<2*30=60>>60.
Ndugu yake Kris anafanya kazi kwa kasi mara mbili ya Kris kwa dakika 15 za kwanza, hivyo anavuma maballuni 2*2=<<2*2=4>>4 kwa dakika.
Hivyo, katika dakika 15 za kwanza, ndugu yake Kris anavuma maballuni 4*15=<<4*15=60>>60.
Katika dakika 15 zilizobaki, anafanya kazi kwa kasi mara mbili ya kasi yake ya awali, hivyo anavuma maballuni 4*2=<<4*2=8>>8 kwa dakika.
Hivyo, katika dakika 15 zilizobaki, ndugu yake Kris anavuma maballuni 8*15=<<8*15=120>>120.
Kwa jumla, Kris na ndugu yake wamevuma maballuni 60+60+120=<<60+60+120=240>>240.