Question

One ventilation fan changes the air in the house in 3 hours. A second fan vents the same volume of air in 6 hours. How long will it take to vent the house if both fans are working?show your solution​

Answer 1

Answer:

vity 2: Solve the given problems. Make a table to come up with the equation to be used. SHOW YOUR COMPLETE SOLUTION. l. One ventilation fan changes the air in the house in hours. A second fan vents the same volume of air in hours. How long will it take to vent the house if both fans are working? 2. Jojo and Jayson can paint an apartment in hours working together. If Jojo can do the same job alone in hours, how long would it take Jayson to finish it alone?

Answer 2

Answer:

work done by both fanin 1 hour is

=(1/3) +(1/6) =(1/2)

so it will take 2 hours together