AF #9 California Math Standards Practice Name______
AF 4.2 Solve multi-step problems involving rate, average speed, distance, and time or a direct variation.
ERHS2010
Guided Practice
1. An airplane flies 450 miles in 3 hours. What is the average speed of the airplane in miles per hour?
1.______
Practice
1. On a driving trip, Carlos averages 60 miles per hour. At that rate, how long will it take him to reach Smallville which is 270 miles away?
1.______
2. Sheri goes to the gas station to fill up her RV. The gas is being pumped at a rate of 4 gallons per minute. If it takes her 12 minutes to fill up the gas tank, how many gallons of gas did she buy?
2.______
2. A water pump can pump out 8 gallons of water each minute. At that rate, how long will it take to empty 264 gallons of water out of a small pond?
2. ______
3. At the Fontana Raceway, Dale averages a 162 miles per hour. At that rate of speed, how far will he travel in 2.5 hours?
3. ______
4. After filling helium balloons for the party, Alex accidentally forgot to shut the valve off completely. If there is 40 pounds of helium left in the tank and it is escaping at a rate of one-half pound per minute, how long will it take for all the helium to escape?
4.______
Homework
1. On a driving trip, John averages 70 miles per hour. At that rate, how long will it take him to reach Las Vegas which is 350 miles away?
1.______
2. Megan goes to the gas station to fill up her car. The gas is being pumped at a rate of 4 gallons per minute. If it takes her 6 minutes to fill up the gas tank, how many gallons of gas did she buy?
2.______
3. A freight train averages a 46 miles per hour. At that rate of speed, how far will he travel in 12 hours?
3. ______
4. After filling helium balloons for the party, Alan accidentally forgot to shut the valve off completely. If there is 20 pounds of helium left in the tank and it is escaping at a rate of one-half pound per minute, how long will it take for all the helium to escape?
4.______
5. An airplane flies 600 miles in 2.5 hours. What is the average speed of the airplane in miles per hour?
5.______
6. A heavy duty water pump can pump out 10 gallons of water each minute. At that rate, how long will it take to empty 2,450 gallons of water out of a flooded street?
6. ______
ERHS2010