Question 769229
Get to Work = W
Driving Speed = S
W = k/S
k = constant of proportionality
To find 'k'
W = k/S
1.5 = k/20mph
k = 1.5 * 20
k = 30
Formula:
W = 30/S
W = 30/50
W = 0.6 hour
W =  36 minutes
Hope this helps.
:-)