An old clattery auto is to drive a stretch of 2 miles, up and down a hill, /\. because it is so old, it cannot drive the first mile— the ascent —faster than with an average speed of 15 miles per hour. question: how fast does it have to drive the second mile— on going down, it can, of course, go faster—in order to obtain an average speed (for the whole distance) of 30 miles an hour? answer fast plz