# A can finish a work in 18 days and B can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day ?

$\par&space;A's&space;one&space;day's&space;work&space;=$  $\frac{1}{18}$

$\par&space;B's&space;one&space;day's&space;work&space;=$  $\frac{1}{9}$

$\par&space;(A+B)'s&space;one&space;day's&space;work&space;=$ $\frac{1}{18}+\frac{1}{9}&space;=&space;\frac{1}{6}$