Svetlana Z. answered 03/14/17
Tutor
5.0
(372)
Female Engineer, UC Berkeley PhD, 30+years industry 1700+ hours tutor
It takes him 14 minutes to drive 10.5 miles, this means that it takes him 14./10.5 minutes to go one mile
Then it takes him 14/10.5*23 minutes = 30.67 minutes to go 23 mniles