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

### Instruction:
Bob drove for one and a half hours at 60/mph.  He then hit construction and drove for 2 hours at 45/mph. How many miles did Bob travel in those 3 and a half hours?

### Response:
 Bob alikwenda kwa saa moja na nusu * 60/mph = <<1.5*60=90>>90 maili.
Bob alikwenda kwa saa mbili * 45/mph = <<2*45=90>>90 maili.
Jumla ya Bob alisafiri kwa 90 + 90 maili = <<90+90=180>>180 maili.