J. Goveia, a long distance bike racer, just rode 24 minutes up one side of Milkrun Hill at 3 mph and 6 minutes down the other side at 50 mph. He mistakenly computes his average speed over that stretch of road as (3 + 50)/2 = 26.5 mph. Apply a weighted average approach—using the minutes at each speed as weights—to produce the real average speed appropriate here.