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

### Instruction:
Stella and Twinkle are filling up a truck with a capacity of 6000 stone blocks at the rate of 250 blocks per hour per person. They work for four hours and are then joined by 6 other people who also work at the same rate. How many hours did filling the truck take?

### Response:
 Stella na Twinkle walijaza lori kwa kasi ya vifusi 250 kwa saa kwa kila mtu, jumla ya 2*250 = <<250*2=500>>500 vifusi kwa saa kwa wote.
Baada ya kufanya kazi kwa masaa manne, Stella na Twinkle walikuwa wamejaza 4*500 = <<4*500=2000>>2000 vifusi ndani ya lori.
Idadi ya vifusi ambavyo walihitaji kuweka ndani ya lori ili liwe kamili ni 6000-2000 = <<6000-2000=4000>>4000
Wakati watu wengine 6 walijiunga na Stella na Twinkle, jumla ya watu wanaojaza lori ilikuwa 2+6 = <<2+6=8>>8
Wakifanya kazi kwa kasi ya vifusi 250 kwa kila mtu, watu wanane walijaza lori na vifusi 250*8 = <<250*8=2000>>2000 kwa saa.
Ikiwa kulikuwa na vifusi 4000 ambavyo bado vilitakiwa kuwekwa ndani ya lori, watu 8 walichukua masaa 4000/2000 = <<4000/2000=2>>2 kujaza lori na vifusi.
Jumla ya muda uliochukua kujaza lori ni 4+2 = <<4+2=6>>6 masaa.