It takes 9 minutes to fill an empty aquarium to a depth of 3/5 meters. What is the unit rate in minutes per meter?
9 / (3/5) = x / 1 cross-multiply
9 = (3/5)x multilpy bot sides by 5/3
9 (5/3) = x = 15 minutes per meter
(3/5) / 9 =3/5 X 1/9 =3/45 =1 / 15 This is "meters per minute"
9 / (3/5) =9 X 5/3 =45/3 =15 minutes per meter!.
