You can put this solution on YOUR website! 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 =
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.