7th Grade Math

Lesson 1E Convert Measurements 641

Example 1 11 GO-KARTS A go-kart’s top speed is 607,200 feet per hour. What is the

speed in miles per hour?

Example 2 2. SPORTS A skydiver is falling at about 176 feet per second. How many feet

per minute is the skydiver falling?

Example 3 3. CYCLING Lorenzo rides his bike at a rate of 2.2 meters per second. About

how many miles per hour can Lorenzo ride his bike?

= Step-by-Step Solutions begin on page R1.

Extra Practice begins on page EP2.

Example 1 4. WATER Water weighs about 8.34 pounds per gallon. How many ounces

per gallon is the weight of the water?

5. BIRDS A peregrine falcon can fly
   322 kilometers per hour. How many
   meters per hour can the falcon fly?

Example 2 6. RUNNING The fastest a human has

ever run is 27 miles per hour.

How many miles per minute did the human run?

Example 3 7. PLUMBING A pipe is leaking at 1.5 cups per day. About how many liters

per week is the pipe leaking?

Convert each rate. Round to the nearest tenth if necessary.

8. 20 mi/h =  ft/min 9. 16 cm/min =  m/h


9. 45 mi/h =  ft/s 11. 26 cm/s =  m/min


10. 2.5 qt/min =  L/h 13. 13 lb/gal =  kg/L


11. 7 m/min =  yd/h 15. 4.7 g/cm =  oz/in.


12. INTERNET The speed at which a certain computer can access the Internet is
    2 megabytes per second. How fast is this in megabytes per hour?

B 1717 INSECTS The table shows the

Housefly 4.4 190

Honeybee 5.7 250

Dragonfly 15.6 38

Hornet 12.8 100

Bumblebee 6.4 130

Insect

Speed

(miles

per hour)

Wing Beats

per Second

Flying Insects

speed and number of wing

beats per second for various

flying insects.

a. What is the speed of a housefly

in feet per second?

b. How many times does a

dragonfly’s wing beat

per minute?

c. How many kilometers can a bumblebee travel in one minute?

d. How many times can a honeybee beat its wings in one hour?

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