alt Hacker News41 mph, assuming the person asking the question was just really passionate about rounding numbers and/or had just the bare minimum viable measurement tooling available :)))
41 mph, assuming the person asking the question was just really passionate about rounding numbers and/or had just the bare minimum viable measurement tooling available :)))
I'm afraid your maths doesn't add up, so you've missed their point: it can't be done.
To average 30mph over 2 miles, you need to complete those 2 miles in 4 minutes.
But travelling the first mile at 15mph means that took 4 minutes. So from that point the only way to do a second mile and bring your average to 30mph is to teleport it in 0 seconds.
(Doing the second mile at 41mph would give you an average speed of just under 22mph for the two miles.)