Question 587203
Distance to be traveled = 20 miles

Speed at which you're traveling = 70 miles per hour =  70 miles/ 60 minutes
 =  7/6 miles per minute

Let the time taken by you to reach boulder city be t.

We know that  Speed = {{{ (distance traveled)/ (time taken)}}}

So,  7/6 miles per minute = 20 miles/t
      7*t = 6*20   {Cross multiplication}
       7t = 120
        t = 120/7
    or   t = 17.14 minutes

Hence, it will take 17.14 minutes for you to reach there.


Hope this helps~!