Question 641062
Inverse variation means that t=k/d^2 where k is the constant of proportionality
Sooo
20 hrs=k/2^2 or
k=80

Now
5hrs=80/d^2
5d^2=80
d^2=16
d=sqrt16=4 in

CK
5hrs=80/4^2
5hrs=80/16
5hrs=5hrs

Hope this helps---ptaylor