It takes 80 identical printing machines 5 hours to print 200,000 posters. How long would it take 50 of these machines to print the same total? Choices:
A) 6 hr, 40 min	B) 7 hr	C) 7 hr, 30 min	D) 8 hr	E) 10 hr
50% of 80 = 40% or 0.40   5 hr x 60 min = 300 min   300 min x 0.40 = 120 min   120 min + 5 hr = 2 hr + 5 hr = 7 hr total   It will take 50 machines 7 hours to print the same amount of posters.   Answer is 7 hr
<result>B</result>
It takes 80 identical printing machines 5 hours to print 200,000 posters. How long would it take 50 of these machines to print the same total?