Answer
$3.6 or 3hrs 36min $
Work Step by Step
$ d=r \times t$
plug the information given in to the formula
d=90
r=50
t= you will solve for t
$90=50\times t$
divide both sides by 50 since you want to get t by itself
$90 =50\times t$
$\div50$ $\div50$
$1.8=t$
since the trip was ROUNDTRIP you double your awnser
$1.8\times2=3.6$
to convert 3.6 into hours and minutes
multiply the part after the decimal which is 0.6 by 60 since there is 60 minutes in
an hour
$0.6\times60=36$
the 3.0 already represents the hours so replace the 0.6 with the 36min
it took 3hours and 36min to drive roundrip
