Question 88132
Think of it this way...
The typist is at 1/6 at time zero, and gets to 3/4 at time 6hrs.
The amount completed in 6 hours is:
{{{3/4-1/6}}}
Re-write in terms of the LCD (12)
{{{9/12-2/12=7/12}}}
So now you know that the typist can complete 7/12ths of the paper in 6 hours.
You need to find out how much the typist can complete in one hour. So set up
a proportion equation, where x is the amount completed in 1 hour:
{{{(7/12)/6hr=x/1hr}}}
Solve for x:
{{{x=(7/12)/6}}}
{{{x=7/72}}}
So now you have x, which is the amount of the paper that the typist can complete
each hour.
Good Luck,
tutor_paul@yahoo.com