SOLUTION: 1. The illumination produced on a page by lamp is directly proportional to the wattage of the lamp and inversely proportional to the square of the distance between the lamp and the

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: 1. The illumination produced on a page by lamp is directly proportional to the wattage of the lamp and inversely proportional to the square of the distance between the lamp and the      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 217080: 1. The illumination produced on a page by lamp is directly proportional to the wattage of the lamp and inversely proportional to the square of the distance between the lamp and the page. Let L1 be the illumination when the distance is 4feet and the wattage is 125 and L2 the illumination when the distance is 5feet and the wattage is 75. Then find the ratio of L1 to L2.
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
125/4^2=7.8
75/5^2=3
7.8:3