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: 12 kilometers per 20 days
Another unit rate: 20 days per 12 kilometers
(b) If the crew builds the same amount of road each day, they can build (12 kilometers/20 days) * 15 days = 9 kilometers of road in 15 days.