Math Word Problems Demystified - A Self Teaching Guide

5. Find the Celsius temperature (C) when the Fahrenheit temperature
   (F) is 50 8. Use C¼^59 (F
   328 ).


6. Find the volume (V) of a cylinder in cubic feet when the height (h)is
   19 feet and the radius (r) of the base is 3 feet. UseV¼3.14r^2 h.


7. Find the force (F) of the wind against a flat surface whose area (A)
   is 20 square feet when the wind speed (s) is 35 miles per hour. Use
   F¼0.004As^2.


8. Find the surface area (A) of a cube in square feet when each side (s)
   measures 12 inches. UseA¼ 6 s^2.


9. Find the current (I) in amperes when the electromotive force (E)is
   18 volts and the resistance (R) is 6 ohms. UseI¼RE.


10. Find the Fahrenheit temperature (F) when the Celsius temperature
    (C) is 50 8. Use F¼^95 Cþ 328.

SOLUTIONS:

1. W¼Fd

¼ 60  9

¼540 ft.-lb.

2. D¼RT

¼ 35 2.5

¼87.5 miles

3. I¼PRT

¼$60007% 8

¼$6000(0.07) 8

¼$3360

LESSON 7 Using Formulas 63