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

### Instruction:
 Kasi ya Prejean katika mbio ilikuwa theluthi tatu ya kasi ya Rickey. Ikiwa wote walichukua jumla ya dakika 70 kukimbia mbio, hesabu idadi jumla ya dakika ambazo Rickey alitumia kukamilisha mbio.


### Response:
 Hebu sema Rickey alitumia dakika t kukamilisha mbio.
Kwa kuwa kasi ya Prejean katika mbio ilikuwa theluthi tatu ya kasi ya Rickey, na Rickey alitumia dakika t kukamilisha mbio, Prejean alitumia 3/4 * t = (3/4) * t = 3/4t dakika kukamilisha mbio.
Pamoja, Rickey na Prejean walitumia t + 3/4t = 70 dakika kukamilisha mbio.
Hii ni sawa na 1 3/4t = 70.
(1 3/4) * t = 70
(7/4) * t = 70
t = 70 * (4/7) = 40 dakika
Rickey alitumia t = 40 dakika kukamilisha mbio.