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

### Instruction:
Wild Bill can shoot a pistol while riding his horse at full speed.  His horse runs at 20 feet per second, and a bullet fired from his gun flies at a speed of 400 feet per second.  But if he fires a gun while riding his horse, and the gun is aimed in the same direction that the horse is running, how much faster, in feet per second, is the bullet flying than if he fires the bullet in the opposite direction of what the horse was running?

### Response:
 Ikiwa anafyatua risasi kwa mwelekeo sawa na mwelekeo ambao farasi anakimbia, kasi jumla ya risasi ni jumla ya kasi ya farasi ya futi 20 kwa sekunde na kasi ya risasi ya futi 400 kwa sekunde, kwa kasi ya pamoja ya futi 20+400=<<20+400=420>>420 kwa sekunde.
Ikiwa anafyatua risasi kwa mwelekeo tofauti na ule ambao farasi anakimbia, basi kasi jumla ya risasi ni kasi ya risasi ya futi 400 kwa sekunde minus kasi ya farasi ya futi 20 kwa sekunde, kwa kasi ya neti ya futi 400-20=<<400-20=380>>380 kwa sekunde.
Hivyo, tofauti ya kasi kati ya hali hizo mbili ni 420-380=<<420-380=40>>40 futi kwa sekunde.