My car can go 120 miles an hour. I've driven 180 miles, how long have I been driving? (You can't know, the rate that my car can drive is independent of how I've

My car can go 120 miles an hour. I've driven 180 miles, how long have I been driving? (You can't know, the rate that my car can drive is independent of how I've used it.) This drone can plant 40k seeds in a day, that doesn't mean they've used it to plant 40k seeds in a day.