Question

Calculate each unit rate.

a) A bus traveled 288 km in 4 hours.

b) A fish swam 75 m is 25 s.

c) Seven lemons cost $1.40.

d) $250 for a 5-day car rental.

Answer 1

Answers:

• a) 72 km per hour
• b) 3 meters per second
• c) 0.20 dollars or 20 cents per lemon
• d) 50 dollars per day

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Step-by-step explanation:

• a) Divide the distance over time to get the unit rate, which is the speed in this case. Speed = distance/time = 288/4 = 72 km per hour.
• b) Like before, divide the distance over time to get 75/25 = 3 meters per second.
• c) We want the cost of 1 lemon. So we'll divide the total cost over 7 to get (1.40)/7 = 0.20 dollars = 20 cents per lemon
• d) Divide the total cost over the 5 day period. This will get the cost of each day. So we have a unit cost of 250/5 = 50 dollars per day.