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

### Instruction:
 Kufika katika maktaba, Jill anatumia dakika 12 kusubiri basi lake la kwanza, dakika 30 kusafiri kwenye basi lake la kwanza, na nusu ya muda wa kusubiri na kusafiri kwenye basi lake la pili. Dakika ngapi anachukua safari yake ya pili kwenye basi?


### Response:
 Kwanza ongeza muda uliotumika kusubiri basi la kwanza na muda uliotumika kusafiri kwenye basi hilo: dakika 12 + dakika 30 = <<12+30=42>>42 dakika
Kisha gawanya muda huo kwa 2 ili kupata muda uliotumika kwenye basi la pili: 42 dakika / 2 = <<42/2=21>>21 dakika