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

### Instruction:
 John anaanza katika kimo cha futi 400. Anasafiri chini kwa kasi ya futi 10 kwa dakika kwa dakika 5. Kimo chake sasa ni kipi?


### Response:
 Alishuka futi 10*5=<<10*5=50>>50.
Hivyo, yuko katika kimo cha futi 400-50=<<400-50=350>>350.