You can put this solution on YOUR website! Okay, well we know the speed and the distance, but we want to know the time.
We know that D=R*T
So now we plug in the known numbers
60=40*x
Now we divide both sides by 40
60/40= 1 1/2
So it took 1 1/2 hours or 90 minutes to get to the lake.
Hope this helps!