Question 170024
Barn painting. Melanie can paint a certain barn by herself
in x days. Her helper Melissa can paint the same barn by
herself in 2x days. Write a rational expression for the fraction
of the barn that they complete in one day by working together
:
Let the completed job = 1
:
{{{1/x}}} + {{{1/((2x))}}} = {{{(2 + 1)/(2x)}}} = {{{3/(2x)}}}
:
Evaluate the expression for x = 5
:
{{{3/((2*5))}}} = {{{3/10}}} of the barn painted in one day
: