Question 1057916
Let n be the rate at which the larger pipe can fill the tank. Then the smaller pipe is n+2.2--So
1/n + 1/n+2.2=1/8.2
8.2(n+2.2)+8.2n=n²+2.2n
1640n+1804=100n²+220n
100n²-1420n-1804=0
Using the quadratic formula, we get n=15.3734515167 or  -1.17345151675. Discarding the negative result, we get time it would take for the larger pipe alone to be 15.3734515 hours. &#9786;&#9786;&#9786;&#9786;