Question

It takes Caroline 1 hr to ride the train to work and 1.5 hr to ride the bus. Every week, she must make at least 5 trips to work, and she plans to spend no more than 6 hr in travel time. If a train trip costs $5 and a bus trip costs $4, how many times per week should she ride each in order to minimize her cost?

Answer 1

I think the answer is 1 bus 4 trains

Answer 2

2 bus and 3 train 6hrs = $23
1.5h + 1.5h = 3h = $8
1h + 1h + 1h = 3h = $15
3h + 3h =6h = $8 + $15 = $23