Name________________________

WORD PROBLEMS--RATES #1--KEY

Directions:  Find the rate in each problem below.  There are several ways to solve rate problems.  The simplest strategy is to simply divide the data.  The key is to divide the data in the correct order.  If the question asks you to find the miles/hour, then you should find the quotient of the miles divided by the hours, not the hours divided by the miles.

1)	 John ran ½ mile in ¼ of an hour.  What is his speed in miles per hour?                                         1) 2 mph    

2)	Tracey’s cookie recipe required 1/20 of a cup of sugar for each ½ of a cookie.  How much          2) 1/10 cup/c    
sugar did she need per cookie?                                                                                                         

3)	It rained 1/5 of a centimeter every 1/3 of an hour.  What was the rate in centimeters/hour?           3) 3/5 cm/h        

4)	Isabella grew 1/12 of a foot in ¼ of a year.  What is her growth rate in feet/year?                         4) 1/3 ft/y        

5)	The temperature dropped a ½ degree every 1/6 of an hour.  How much did it drop per hour?       5) 3 deg/h 

6)	Ava’s candle burned 1/8 inches of wax every ½ hour.  How much wax did it burn per hour?       6) ¼ inch/h        

7)	Jayden filled his pool with ½ a gallon of water every 1/8 of a minute.  How many gallons           7) 4 gall/min 
of water was he using every minute?

8)	Addison drove 20 miles in 1/3 of an hour.  What was her speed in miles per hour?                       8) 60 mph      

9)	Jackson made 1/10 of a dollar every 1/60 of an hour.  How much did she make per hour?            9) $6/hour    

10)	Hailey’s plane climbed 9/12 feet in 1/4 seconds.  How much did the plane climb per second?     10) 3 ft/sec    

11)	It took Jacob 1/2 of a minute to drive 3 laps.  How many laps per minute did he drive?                11) 6 laps/m    

12)	Sophia harvested 5/6 lbs. of corn in 2/3 minutes.  How much corn did she harvest per minute?   12) 1 ¼ lbs./m    

13)	It took Aiden 1/6 of an hour to walk 5/6 of a mile?  What is his speed in miles/hour?                   13) 5 mph  

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