WE CAN SOLVE THIS PROBLEM AS A VIC (VARIABLE IN ANSWER CHOICE) AND...
32. We can solve this problem as a VIC (Variable In answer Choice)
and plug in values for the variable x. Let’s say x = 6. (Note that
there is a logical restriction here in terms of the value of x. Lindsay
has to have a rate of less than less than 1 room per hour if she
needs Joseph’s help to finish in an hour).
If Lindsay can paint 1/6 of the room in 20 minutes (1/3 of an hour),
her rate is 1/2.
rt = w
r(1/3) = 1/6
r = 1/2
Let J be the number of hours it takes Joseph to paint the entire
room. Joseph’s rate then is 1/J. Joseph and Lindsay’s combined
rate is 3/2 + 1/J, which can be simplified: