Complete the parts below. Write your answers as whole numbers or fractions in simplest form.
(a)A construction crew built 12 kilometers of road in 20 days. Give two different unit rates using this relationship.
One unit rate: (Choose one): (kilometers or days) per (Choose one): (kilometers or days)
Another unit rate: (Choose one): (kilometers or days) per (Choose one: (kilometers or days)
(b)Assume the crew builds the same amount of road each day. How many kilometers of road can they build in 15 days?
(a)
One unit rate: kilometers per day
Another unit rate: days per kilometer
(b) If the crew built 12 kilometers of road in 20 days, their rate is 12 kilometers / 20 days = 0.6 kilometers per day.
Therefore, in 15 days, they can build 15 days * 0.6 kilometers per day = 9 kilometers of road.