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

### Instruction:
Mr. Maxwell takes 1 hr to drive to work in the morning but 1 and half hours to drive back home in the evening. If the morning and evening traffic is similar and he drives at an average speed of 30mph in the morning, what is the average speed of his return journey?

### Response:
 Bwana Maxwell huchukua saa 1 kuendesha kwenda kazini asubuhi, ambayo ni maili 30.
Jioni, Bwana Maxwell huchukua saa 1 na nusu kuendesha kurudi nyumbani, ambayo ni 1.5 * 30 = <<1.5*30=45>>45 maili.
Hivyo, kasi wastani ya Bwana Maxwell ni (30 + 45) / 2 = <<(30+45)/2=37.5>>37.5mph.