SOLUTION: Full tank with 3 one inch holes drains in 7.2 hours. Same size tank full has 7 one inch holes, how long will it take to drain?

Algebra ->  Test  -> Lessons -> SOLUTION: Full tank with 3 one inch holes drains in 7.2 hours. Same size tank full has 7 one inch holes, how long will it take to drain?      Log On


   

Question 623439: Full tank with 3 one inch holes drains in 7.2 hours. Same size tank full has 7 one inch holes, how long will it take to drain?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Full tank with 3 one inch holes drains in 7.2 hours.
Same size tank full has 7 one inch holes, how long will it take to drain?
:
Let t = time to drain with 7 holes
:
Inverse variation equation (the greater the number holes, the less time)
3%2F7 = t%2F7.2
Cross multiply
7t = 3 * 7.2
7t = 21.6
t = 21.6%2F7
t = 3.1 hrs