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?
:
Let t = time to drain with 7 holes
:
Inverse variation equation (the greater the number holes, the less time)
{{{3/7}}} = {{{t/7.2}}}
Cross multiply
7t = 3 * 7.2
7t = 21.6
t = {{{21.6/7}}}
t = 3.1 hrs