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

### Instruction:
Chrystal’s vehicle speed is 30 miles per hour. Ascending the mountain decreases its speed by fifty percent, and descending the mountain increases its speed by twenty percent. If the distance going to the top of the mountain is 60 miles and the distance going down to the foot of the mountain is 72 miles, how many hours will Crystal have to pass the whole mountain?

### Response:
 Kasi ya gari inapungua hadi 30 x 50/100 = <<30*50/100=15>>15 maili kwa saa wakati inapanda kwenye kilele cha mlima.
Hivyo, jumla ya muda Chrystal atatumia kwenda kwenye kilele cha mlima ni 60 / 15 = <<60/15=4>>4 masaa.
Na kasi ya gari inaongezeka kwa 30 x 20/100 = <<30*20/100=6>>6 maili kwa saa wakati inashuka mlima.
Hivyo, kasi jumla ya gari wakati inashuka ni 30 + 6 = <<30+6=36>>36 maili kwa saa.
Hivyo, jumla ya muda Chrystal atatumia kwenda chini hadi miguu ya mlima ni 72 / 36 = <<72/36=2>>2 masaa.
Hivyo, jumla ya masaa atatumia kupita mlima mzima ni 4 + 2 = <<4+2=6>>6 masaa.